Skipper’s Tips #21 – Rules of the Road

I remember, many years ago, sitting down to learn the ‘Highway Code’.  It all seemed very logical, and I suppose it ought to be. After all, if you are going to commit something to memory and then expect to act on it in the future, whatever it is you are trying to remember needs to be kept simple; so it is with the International Regulations for the Prevention of Collisions at Sea (IRPCS). 

However, not everyone who uses the roads abides by the rules and we have all seen the results of this cavalier approach on many occasions, of that I’m sure. Sadly, it is little different on the water. In fact, some would say it is even worse. We are all aware that anyone can buy a boat and set off from the shore at will. The question of whether there should be regulations in place to prevent people from doing precisely that and potentially putting their lives or other people’s lives at risk is one for another time but nevertheless this is how the law currently stands. The upshot of this is, in an environment where sticking to the rules is even more important in some instances than it is on the road, a large contingent of water users are blissfully unaware of how to conduct themselves when in the vicinity of other craft, especially commercial vessels.

To my utter dismay, I regularly witnessed incidents of people navigating their boats in busy, narrow waterways with scant regard for other water users around them. One example comes immediately to mind. Once, when coming into the Hamble River, I spotted a large motor cruiser coming from the opposite direction. The person on the helm had not spotted that his speed was so fast that he was creating a sizeable wake (against the local regulations in the river) and worse still, he was navigating on the wrong side of the river (against the IRPCS). Yachts and other motor cruisers alike were forced to duck for cover, shooting off in all directions to avoid being mown down by this lunatic who gave no indication that he was going to move out of anyone’s way.  I could imagine the chap at the helm being of somewhat ‘Toad’ like proportions and muttering under his breath, “Parp, parp”.

What I and surely the other boaters involved in this appalling display of ignorance would like to know, is why, when the rules are so simple to learn and abide by, did this ‘Toad’ drive his boat in this manner?

The IRPCS is as close as we can get on the water, to having a highway code. Naturally, without defined lanes to sail along, the chance of bumping into someone is greatly increased. It, therefore, makes sense to have a set of logical guidelines to follow in order that we can all go about our business without continually colliding with each other.

The ‘Coll Regs’, as they are often called, are hard work to wade through in one go, but try dipping in and out from time to time to keep yourself up to speed. I would also suggest to you that keeping a complete IRPCS on board your boat at all times would be good practice.

The regulations cover; lights, day shapes, sound signals, general rules about avoiding collisions and your responsibilities towards other water users.  Here are some of the general rules:

  1. It is the responsibility of the skipper to maintain a good look-out at all times.
  2. Vessels of less than 20m should not impede the safe passage of large (>20m) vessels in a narrow channel.
  3. Overtaking boats must keep clear.
  4. Power gives way to sail.
  5. Vessels should keep to the starboard side of a narrow channel.
  6. There is a risk of collision if the bearing of an approaching vessel remains constant.
  7. When boats under power are crossing, the vessel with the other vessel on its starboard side must give way.
  8. There is no such thing as ‘Right of Way’.

I am sure that nearly all of you will be aware of the obvious rules, such as keep to the right- hand side of a channel and power gives way to sail but there are some rules that don’t seem to be common knowledge.  Did you know, for instance, that if a sailing boat overtakes you, it is obliged to keep clear of you?  Did you know that the Solent, starting at the Needles, is regarded as a narrow channel with channels delineated by port and starboard markers?

Keeping a good lookout is commonsense, right?. What folk forget though, is this doesn’t just mean looking all around you but it also includes using your radar if you have one fitted. Not having your radar switched on and being able to operate it when you are out at night or in any reduced visibility situation means that you are not abiding by the rules. In fact, a collision caused by misreading your radar could see you taking the lion’s share of the blame for a collision with another vessel. Go and take a radar course this winter!

Here’s a little ditty for you: ‘If to starboard red appear, ‘tis your duty to keep clear’.  That should help decide who the ‘stand on vessel’ is and who the ‘give way’ vessel is in a crossing situation.

By the way, according to the IRPCS, there is no such thing as ‘right of way’.  We are ALL obliged to avoid a collision. There is little point in crashing into another boat when you could easily see what was going to happen and could have turned away, just because you were determined that you were the ‘stand on vessel’ and the other boat must move out of your way.  

This has been another Captain Corbett’s Adventure.  If I’m not in the office dreaming about delivering a boat or teaching Yachtmaster and Day Skipper courses then I’m probably off somewhere exotic on holiday!  Whichever it is, I will still be adding my adventures and skipper’s tips so click follow and you will never miss another update.

Skipper’s Tips #20 – Jack Speak

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Happy New Year everyone!

So, I’m feeling frivolous today. Despite being the easy-going fellow you all know and love, I’m going to get on my high-horse and spout off about something.  I don’t know why I get gripped by this sudden urge to make myself heard, probably a sense of seamanship or the like, but when I hear the Union flag – our national flag – referred to as the ‘Union Jack’, I just have to speak up. It’s right up there with the word ‘Like’ being liberally sprinkled throughout certain people’s sentences. Also, when the word ‘Something’ (with a ‘g’ on the end) somehow becomes ‘Sumfink’ and horror of horrors, the letter ‘h’ (spelt and pronounced ‘aitch’, look it up in a dictionary if you don’t believe me) is childishly pronounced ‘hay-ch’.

Anyway, I digress, that’s a totally different hobby-horse altogether.

OK, let’s get something straight right now, there is no such thing as a Union Jack!

The Union flag, when flown from the front of a Royal Naval vessel, is flown on a Jack Staff.  This, I think, is where the confusion comes from.  Private vessels may fly a Union flag on the bow but only in the form of a Pilot Jack – a Union flag with a white border around it.

It sounds pedantic, I know, but using the correct terminology can save an awful lot of heartache and or embarrassment.  For example, when approaching a navigational mark, which is round and therefore doesn’t have a side, it would be much clearer to tell the helmsman to, ‘leave the mark to our port side’, rather than the ‘right side’ of the buoy. There is only one ‘port side’ and one ‘starboard side’ on a boat so, by using the correct terminology there cannot be any confusion as to which course the boat should take.

Using ‘jargon’ will help both you and your crew when instructions are being issued, especially in the heat of the moment.  The last thing any boat owner wants is to come alongside a solid, GRP scrapping pontoon without any fenders hanging down the side of the boat.  If you shout, “Throw the fenders out”, to an ill-informed crew, there is every possibility you will get a trail of white, plastic, sausage-shaped balloons floating behind you as you approach your berth – clearly, this is not what you had in mind and you would only have yourself to blame, for the last minute change of plan to that mooring manoeuvre you’ve been fretting about ever since leaving the previous mooring.

And by the way, they are ‘Charts’, not ‘Maps’ and ‘Port side to’ does not mean two fenders on the port side!

This has been another Captain Corbett’s Adventure.  If I’m not in the office dreaming about delivering a boat or teaching Yachtmaster and Day Skipper courses then I’m probably off somewhere exotic on holiday!  Whichever it is, I will still be adding my adventures and skipper’s tips so click follow and you will never miss another update.

 

Skipper’s Tips #19 – The Gas Man Cometh

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I’m on a health kick at the moment.  Actually, on and off for over a year now, I’ve been regularly cycling around chunks of Jersey. At the beginning of June I determined to up my game and now I cycle back and forth to work every day – well, every day it’s not raining that is!  The upshot of this ‘communing with Nature’ is that I am intimately aware of changes in the weather.  The odd rainy or windy day does not a Winter make but a week of teeth chattering and soggy rides tell me that Autumn has either arrived or is imminent.

Given that we can expect the number of great boating days to start diminishing rapidly now, I thought this might be a good time to talk about preparing your boat for the winter months.  That’s not to say you should pack it away and forget about it until next April but there will be days when you are free to go boating yet don’t fancy bashing about the sea for a few hours.  Getting the engines serviced and pulling her out of the water to check the anodes and replace the anti-foul are perfect jobs to get sorted when you do not plan to go out to sea.  I’m a huge fan of winter boating, as I’m sure anyone who knows me personally or reads this blog will testify to. I’ve been out on the Solent in December with crystal clear blue skies, flat water and not another boat in sight.  Wrap up warm or put the heater on, either will do but you really don’t want to miss days like these by sticking your boat on the hard with all the fluids drained and bits of paper stuffed up the outlets. Besides which, the sea gives your engines more protection from the cold than propping her up on stands ever will – food for thought?

Anyway, I digress.  Let’s go back to thinking about the jobs that you’ve put off all year and really can’t be left any longer.  Think of the upholstery, interior fabric surfaces and bedding. In the winter months, these will all go mouldy unless you make provision for the moisture that accumulates in boats.  Firstly, remove any fabrics that, realistically, are not going to be used for a while.  Next, clean out the bilges and dry them out – a good idea is to leave the floor panels propped up/open so that air can circulate.  This will help to keep them dry and prevent them from becoming smelly.  If you have airconditioning on your boat then there is often a setting which effectively works like a dehumidifier.  The a/c kicks in every few hours to dry out the air and then turns itself off again.  If you don’t have a/c or this setting then I heartily recommend getting a dehumidifier and running it on your boat over the months you are not using it.  Standing the dehumidifier by a sink means that the collected moisture can drain straight overboard to save you having to go and empty the water manually every few days.  This doesn’t absolve you from the responsibility of regularly checking on your boat but it does mean that if you can’t get down to your boat for a period you won’t have to worry about the container filling up and the unit switching itself off.

Empty the cupboards out and chuck away all stuff you never use and never will.  Get rid of food that is out of date.  Check stocks of batteries for torches, etc. Make a list of all the items that stopped working in the summer and that you’ve been meaning to get fixed but didn’t.  If you are feeling really keen about your navigation you might consider getting the ship’s compass corrected. Clearly, there are a whole host of things to attend to and now is the time to do it.

One thing I haven’t mentioned yet and it often gets missed is the gas system. You might not have gas on your boat, in which case this probably isn’t relevant to you but if you do, read on.

Whilst many of the safety items you have on your boat are checked on a regular basis, simply by virtue of being used or on show, there are certain items that never get touched from one year to the next.  The liferaft is one example that springs immediately to mind.  Stuck in a locker, only seeing the light of day in the unfortunate event that something goes seriously wrong.  The other item that often gets forgotten about is the gas system.

It is my opinion that every boat should have gas sensors fitted so that a gas leak can be detected in time to prevent a calamity.  The gas sensors should be sited low down in the boat – gas, being heavier than air, will sink into the bilges.  The problem here is that the sensors themselves are susceptible to water damage.  Once soaked by water, sensors will give erroneous alarm signals or not even function at all.  I would suggest that if you intend to fit or replace gas sensors to your boat, that you select waterproof sensors.

Almost as important as fitting sensors is a regular check on your gas system. Even though it is possible to check the system yourself, I would recommend that you get a CORGI registered engineer to check your system on an annual basis.  Any hoses that need replacing will be identified, as will any potential leaks or issues with your cooker and hob.

I organised a check on my own boat at the same time as we had the school boat checked, which we had to do every year for coding purposes. The check on my boat revealed that I needed two hoses replacing. The scary thing was that one of the hoses was almost completely worn through and would soon have made the boat a potential death trap.  Incidentally, I had looked at the hoses myself and they appeared to be fine, but the damaged section was out of view and I simply had not looked properly.  I wonder how many boaters give their gas hoses a cursory glance and assume everything is fine?

Happy boating everyone and have a great Christmas! (Oh my goodness, I mentioned the ‘C’ word and it’s only October)

This has been another Captain Corbett’s Adventure.  If I’m not in the office dreaming about delivering a boat or teaching Yachtmaster and Day Skipper courses then I’m probably off somewhere exotic on holiday!  Whichever it is, I will still be adding my adventures and skipper’s tips so click follow and you will never miss another update.

Skipper’s Tips #18 – Springing into Summer

At the beginning of summer 2016, I made the momentous decision to start walking down a different career path.  I’ve really enjoyed my time in the maritime industry and I will continue to go out on adventures with some of the amazing friends I’ve made since I first moved to the south coast of England in 1998.

After much agonising and looking back, I have finally embraced my new working life and found the strength to acknowledge the fact that my career in boating is at an end.  I have let my commercial endorsement lapse, my instructor’s ticket is out of date but I still have my Yachtmaster tickets (power & sail), my ICC is still valid and I will never forget all that I’ve learnt and all the incredible people I’ve met and worked with.  I will still be going to sea at every opportunity I get but now it will be to relax instead of work and I am so looking forward to getting my hobby back, even though I have a sneaking suspicion that it will be difficult to keep my trap shut.

It is my intention to keep my blog going too.  I will still be posting my adventures on here.  This will still be a platform for showing off my photographic prowess and of course, the ‘Skipper’s Tips’ will continue to find their way here – I’ve written 52 (one for every week of the year) so there are plenty to go yet.  Perhaps, one day I will put them all together into a book, who knows?

So, without further ado, here’s tip number 18…

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Here’s another ‘boat handling’ tip and I know exactly why this one came about.  I’d been teaching two guys the necessary skills they required to get through their Yachtmaster exam and this is a scenario we came across one day, having just had lunch at the Folly Inn.  The tide was hoofing out, as anyone who’s been down the Medina when spring tides are running will testify it’s prone to do and we’d been seriously hemmed in.  With a little head scratching the guys came up with the answer and I’m happy to say it worked perfectly.  In fact, we even got a round of applause from some onlookers on the pontoon.  This technique will work equally well for both yachts and motor cruisers, although yachts have a distinct advantage as their sterns are usually curved in slightly and as such are less likely to get damaged as the boat is drifted astern by the tide.  It’s also much easier for a yacht to ferry-glide, as the keel works beautifully with the tide.

From time to time we all find ourselves in a less than ideal mooring situation.  It might have been easy on the way in, you know the scenario – wind blowing you onto the pontoon, no tide to contend with, other moored-up boats miles away,  However, when you come to leave it’s all changed. The tide is ‘hoofing’ through and the wind that blew you gracefully alongside the pontoon is now a hurricane and you have inches to spare at either end of your suddenly massive boat.

So what are our options?

Well, option one is to go back into the pub until the wind has died and the tide has stopped running. This isn’t as daft as it seems; if you’re not in a hurry and the wind is due to ease, then why make life difficult for yourself – just remember to stay on the soft stuff, drinking and skippering don’t mix.

Option two is to lean hard on your bow thruster and hope there’s enough power to pull the bow across the tide and then make a dash for it before you get swept onto the boat behind you.  This isn’t a good plan, as plans go, because it relies heavily on perfect timing and there is too great a chance of it all going badly wrong; you would be trying to organise the releasing of lines the bow thruster and the engines all at the same time – add huge amounts of tide and wind and you have a recipe for disaster.

The best option is one where we have control of the boat the whole time.  To this end, I would suggest using a ‘spring’.  Assuming your boat is facing into the tide, you will need to set the forward and stern lines as slips, making sure that the stern line is kept as short as possible, with a roving fender at the stern to protect the bathing platform.  Ideally, if you have enough crew, you should also have a separate person for letting go of the stern line.

Once everyone is correctly briefed, slip the forward line.  The tide will drift you gently backwards. As the stern line tightens up the stern will turn in, towards the pontoon and the bow will swing out into the tide. When the bow is pointing out far enough to clear the boat in front, slip the stern line and motor away from the berth.  If the wind is really strong, you may need to come astern on the outside (opposite side to pontoon) engine to ease the bow out against the wind.

N.B. If the tide is particularly strong, the moment your bow comes across the tide it will exert increasingly stronger sideways pressure on your boat, sweeping you side-on to the channel and drift you down the channel sideways.  The answer is to keep your bow pointing almost directly into the tide flow and continually adjust the ferry-glide as you make your way away from the pontoon – all the time balancing the wind trying to push you back onto the pontoon against the tide trying to pull the bow away from the pontoon.  Get this balancing act right and it’s a beautiful thing to watch, Nature balancing Nature.  Get it wrong and it will get very smelly, very quickly!

This was a good option, well considered by two Yachtmaster candidates who, as you might imagine, both went on to pass their exam – well done Brian and Paul!

This has been another Captain Corbett’s Adventure.  If I’m not in the office dreaming about delivering a boat or teaching Yachtmaster and Day Skipper courses then I’m probably off somewhere exotic on holiday!  Whichever it is, I will still be adding my adventures and skipper’s tips so keep popping back to make certain you don’t miss anything and remember:

The Meek may inherit the Earth but it is the Brave who get the Oceans!

 

 

Skipper’s Tips #17 – Magnetic or True

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I’m sure most boaters or walkers or anyone who navigates their way around using charts or maps will have come across the situation where their compass is pointing one way and their maps or charts are pointing in a slightly different direction.

The reason for this, in simple terms, is that the molten core of the earth, which is constantly moving, is what compasses point at.  However, when you look at the globe from a human perspective, it has been drawn with the North Pole at the top and the South Pole at the bottom, a slightly skewed axis and to add insult to injury, the beautifully drawn land masses are not quite in the position that our trusty new GPS gadgetry now correctly indicates.   Here’s an interesting observation to chew on; if you went out into space and looked at the world, how would you know which way is up? Is the North Pole actually at the top?

I digress…

Obviously, if we are to sail around without bumping into things we need to work out how to work on the same page as the compasses we are utilising.  What we do, is allow for the difference in opinion (Variation) and once applied to the (True) or unadjusted heading, we end up with a (Magnetic) heading figure.  The story doesn’t end there though.  Stick a compass on a boat and all the electronic and magnetic forces on the boat will have a further effect on the compass, confusing the ‘poor dear’ even more, this we call (Deviation).  Making an allowance for the Deviation inaccuracy of the compass gives us the most accurate heading and is called a (Compass) heading.

Do not despair. When you buy a new boat, a compass adjuster will get on board and eradicate as much of the Deviation as possible.  The bit that’s left will be listed on a compass Deviation card so you can allow for it when navigating.  Beware though.  If you change any electronic equipment, or bring items onto your boat that have any electronic or magnetic properties, they will have an effect on the compass and it will have to be ‘swung’ again!

By now you must be starting to wonder how you’ve managed to navigate safely between ports without bumping into rocks and chunks of unexpected land. The answer, of course, is that we all readily use the chart-plotter/GPS equipment that’s become almost as intrinsic as the hull!  The chance of this equipment failing is remote and I have touched on this in another tip but if it were to fail or cease to operate correctly we will have to deal with Variation and Deviation before we can start to steer a course by the boat’s compass.

So, how do we work with Variation and Deviation?  Importantly, you must remember to make these ‘allowances’ in a specific order.  Allow for Variation first and then Deviation. You will also need to decide how you apply the correction.  When dealing with Variation this correction is essentially adding or subtracting the appropriate amount of degrees difference between what the compass is indicating and what the local Variation is shown to be on your chart as either degrees (West) or degrees (East)

Doc 3 Sep 2017, 12-37This is an example of a compass rose on a chart.  The Magnetic Variation shown is 2 degrees, 45 minutes West, correct in 2006.  Each year, this ‘error’ is decreasing by 8 minutes.  There are 60 minutes in a degree, so for 2017 – 11 years on – that’s a reduction of 1 degree and 28 minutes.  Therefore the Magnetic Variation in 2017 is 1 degree and 17 minutes West. Yes, there will come a point when the error disappears completely and then starts to become an East Magnetic Variation.  When I first started teaching, the Variation in parts of the Med was just under 2 degrees West and the last I saw it was almost zero – Point & Go!

N.B. Please remember, Magnetic Variation is nothing to do with whether you are going in a Westerly or Easterly direction, it is actually about your position on the globe relative to that molten core of the Earth which we spoke about earlier.

The question now is, how do we know whether to add or subtract these degrees of Variation or Deviation?  I don’t doubt that there are many different ‘aide memoirs’ but the one I favour, naturally, is the one I made up myself.  If you are calculating from True (shown on the chart) to Compass (the heading you are going to steer to by the ship’s compass) then any Variation or Deviation you allow for that is West must be added.  In other words True To Compass Add West – TTCAW.  It therefore follows, that any Variation or Deviation that you encounter when going from True to Compass that is East must be subtracted; the opposite, see?

Furthermore, when you are calculating from Compass to True, as you might when taking a Magnetic bearing with a hand-bearing compass, you would add East and subtract West. Clear as mud isn’t it?  Have a look at the table below, which has some examples.

Just to reiterate, don’t fall into the trap of thinking the direction you are pointing your boat in determines whether the Variation or Deviation is West or East.  The Variation figure comes from the compass rose on your chart and the Deviation figure from your boat’s deviation card.

True    Variation        Magnetic       Deviation      Compass

231        6 W                  237                  2 W                  239                             add West

079        3 E                   076                    0                     076                             subtract East

147       4 W                  151                   1 E                   150

013       2 E                    011                   2 W                 013

348       2 W                   350                  1 E                   349

To remember the order try,  ‘True Virgins Make Dull Companions’.  Alternatively, if that’s too racy for you, remember the reverse order with,  ‘Cadbury’s Dairy Milk Very Tasty’.

This has been another Captain Corbett’s Adventure.  If I’m not on Jersey teaching a private tuition Day Skipper theory or Yachtmaster theory course, then I’m either spending time with someone on their boat, giving them the confidence to take their boat out with their family and friends on board or I’m off somewhere exotic delivering a boat. Either way, I’ll write it up and put it on the Blog for you all to see, so keep popping back to see my most recent adventures.

 

 

Skipper’s Tips #16 – Green & Clean

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Well there we go, another year over and a new one just begun… I’m sure I’ve heard someone else saying that!

I must put my hands up and apologise for not posting much recently but it’s been a quiet winter for me adventures wise and I’ve had to resort to sitting in front of a computer in an office just to pay the bills 😦

However, the season will soon be upon us and I’m sure it will bring new opportunities in abundance.  In the mean time I’m going to harp on about the environment and our obligation to be mindful of the impact we, as motor boaters, have on it.

This is an extremely important issue which affects us all. Personally, I feel strongly about looking after the environment.  I know this sounds absurd when you consider what I do for a living but motor boats are here to stay and sensibly we should be trying to mitigate the adverse effects we all have on the environment and not just pointing our collective fingers at someone else. A smokey old ‘donker’ on a yacht, will often produce many times more harmful emissions than that of a modern, efficient, common rail diesel engine. So to all yacht owners, don’t get on your high horse just yet – I bet you didn’t cycle or better still walk to your boat the last time you used it, did you?

As boat users we all have a responsibility to the environment; to the sea, the coastline, and of course, to the natural wildlife. It isn’t difficult to be conscientious and considerate, and by following a few simple rules we can all play a part in helping to keep our waters safe and clean for everyone to enjoy. At the very least we should be aiming to minimise the impact our boating has on the environment around us but if we can actually make improvements, then so much the better.

The following items are all very obvious examples of what should never enter the sea:

  • Garbage of any sort, including bio-degradable food materials
  • Oil and oily wastes
  • Sewage – if it is going to be harmful to the amenity value of the local water
  • Toxic wastes

One way to make life easier for yourself, and easier on the environment is to dispose of as much packaging as possible before you load food and drinks onto your boat. Put food into washable, reusable containers to reduce waste on board and keep rubbish in sealed sacks ready to dispose of appropriately when you next get to shore. Another useful tip is to keep a can crusher on board to reduce the space your rubbish occupies. 

We have all had a bilge full of oily water at some stage in our boating career. Instead of dumping it irresponsibly into the water, carry some absorbent pads to soak up the liquid and then dispose of it later in the oil waste drums which are now found at most modern marinas.

Over the years, the practice of discharging toilets directly into the sea has been seen as normal and acceptable yet, at the same time, we are all very aware of the noxious effects this discharge has in busy marinas, particularly when the tidal effect is minimal. I have noticed that more and more people are fitting holding tanks to their boats these days. Sometimes this is because of a conscious decision to take a more ‘friendly’ approach and sometimes it is because local regulations are getting stiffer – many countries in the Med are now insisting on black waste holdings tanks and some are even expecting us to fit grey waste tanks too – I’ve heard of boaters being fined in Greece for discharging their washing-up water from the kitchen sink into the sea. With more and more marinas offering pump out facilities, there really is no excuse to not manage your boat’s waste appropriately. For those of us without a system to contain waste or if your boat lives in an area where pump out facilities don’t exist, nipping three miles out to sea to empty the tanks isn’t a great hardship – we must be mindful of other water users nearby and the tidal movement or indeed lack of it.  It is not always acceptable to simply flush your waste out to sea like sweeping dust under a carpet.

Its not just when we are on the water that we can have a harmful effect on the environment either.  Every year we scrub the hull off and apply new coats of anti-foul. Where does the old anti-foul that has just been scrubbed off the hull go to? Most often, it gets washed into the nearby marina of course.  It goes without saying that anti-foul paint, scrapings and wash-off must not get into the sea as these are serious contaminants.  Make every effort when removing the old anti-foul to tidy up the debris and dispose of it carefully.  I would urge everyone to make a determined effort to use environmentally friendly products at all times to help minimise damage to the environment in the long term.  More and more environmentally products are becoming available.  They are effective substitutes for the existing products and priced the same too.

Have a go folks!  Its not difficult to do this properly and we all benefit.

GO GREEN for 2017!

This has been another Captain Corbett’s Adventure.  If I’m not on Jersey teaching a private tuition Day Skipper theory or Yachtmaster theory course, then I’m either spending time with someone on their boat, giving them the confidence to take their boat out with their family and friends on board or I’m off somewhere exotic delivering a boat. Either way, I’ll write it up and put it on the Blog for you all to see, so keep popping back to see my most recent adventures.

 

Skipper’s Tips #15 – Whether the weather is hot…

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This subject is truly extensive.  There are a huge number of books that have been written about weather and there are many, many people far more knowledgeable than I, who can wax lyrical about world weather systems.  That said, I do know some of the pertinent bits and that’s what I hope to pass on to you today. 

It goes without saying that it’s a good idea to keep an eye on the weather.  Nobody wants to be caught out in bad weather and frankly, with so much good quality forecasting these days, it’s almost inexcusable.  Weather forecasts can be found in newspapers, on the radio and on the television, on regular VHF broadcasts, on the internet, but even easier than all these options, try using ‘Mk 1 eyeball’; stick your head out of the window!

Essentially, as boaters, the weather we need to know about falls into three categories.

  1. Depressions
  2. Sea breezes
  3. Fog

Depressions occur when warm, wet wind crossing the Atlantic, picking up moisture as it goes, comes into contact with the Polar Front, which lies generally to the north of our latitudes.  The cold Polar winds will get underneath these rising, warm, wet winds from the southwest and set up an anti-clockwise, upwards spiral of wind.  As the warm, wet winds rise, they cool. Cold air isn’t capable of carrying as much moisture as warm air and so eventually, the moisture is released as precipitation – that’s rain to you and me.  The difference in air pressure from the outer edge of the depression to the inner centre varies hugely over relatively short distances – we can see this when we look at synoptic weather charts showing the clustering of isobars around the centre of the depression. These tightly packed isobars indicate the large pressures gradients involved, which to you and me essentially means strong winds.  In fact, the closer together the isobars, the stronger the winds.  If you can get hold of a print out of a synoptic chart, there should be a scale on it, which will allow you to measure the precise wind speeds.

Here’s something to consider the next time you get a chance to look at a synoptic chart. In the Northern Hemisphere, the wind cycles anti-clockwise around a low and clockwise around a high.  So, if you get a High and a Low next to each other the wind is likely to be great where they meet as you will have two wind systems effectively going in the same direction.  However, when you get two Low’s next to each other, they cancel each other out at the point at which they meet.  The resulting wind, at this point, will most likely be light and variable in direction.

If we know what to look for we should be able to spot a weather system coming and this will allow us to make an informed decision on whether to go to sea or not.  So, what does an approaching depression look like and what are the clues?

The classic timeline of a depression moving through is as follows:

  • Falling barometer
  • Lowering cloud base
  • Rain
  • Reducing visibility
  • Complete cloud cover
  • Veering (clockwise) change in wind direction as the warm front arrives
  • Steadying barometer
  • Easing of the rain to a continuous lighter rain or drizzle, in the warm sector
  • Rising barometer, as the cold front arrives
  • Thunder clouds, often with the thunder
  • Gusty winds
  • Showery rain
  • Veering wind direction
  • Crystal clear skies, with fluffy white clouds
  • Excellent visibility

Keep your eye on the barometer.  Make a regular note of the readings when you fill in your deck log and you will instantly notice a change.  A fall of 6mb in a two-hour period means head for port; there’s some bad weather due soon.

Clearly, given the basic level of our weather forecasting skills (up to Yachtmaster level), I would still recommend that you also compare what the traditional weather sources are telling you with your new found skill of being able to spot a depression – the weather we experience in and around the UK is very varied and subject to quick changes. Weather systems continually speed up and slow down, often arriving early or not at all.  

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Sea breezes occur on sunny, summer days, when rapidly rising air, which has been warmed by the land heating up, sucks in air from the sea, producing the onshore breeze.  The rising air eventually cools, falling back down over the sea and so the process continues until the evening when the sun goes in.

Katabatic wind is the wind that blows out to sea from the land. As the land, which during the day was hot, cools down, it cools the air above it. This, now heavy, cool air tumbles down the hillsides and coastal cliffs, rushing out to sea.  This wind effect doesn’t last particularly long and personally, I’ve only experienced this in the Med. 

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Fog is caused when warm, wet air gets chilled revealing the moisture content as fog. The classic example of this is in coastal UK waters in Spring, we call this Advection Fog or more affectionately, Sea Fog . The waters around the UK are at their coldest at this time. As the warm, moist air coming across the Atlantic meets the cold waters around the UK, the chilling effect reveals the moisture as fog.  It can often burn off by mid-afternoon but occasionally it can hang around for a few days until the wind direction changes and the temperature differential changes.  I’ve seen waves of fog plague islands in the early Summer months and even in August on Jersey one time when I was delivering a new boat to a customer and got fog-bound myself. 

Radiation Fog or Land Fog, as some call it, happens mostly in the Autumn months. After a warm, sunny September day, the land, which has been warming up during the day, will chill down quickly under clear skies.  This chilling cools the air lying over the ground, which in a Katabatic Wind style, tumbles down into valleys and estuaries where it meets warm, moist air lying over streams and rivers.  The chilling effect of this cold air produces the fog – which gives us those romantic looking photographs that people like me love to capture.

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Please don’t base your boating plans on a forecast you had five days ago – 12 to 24 hour forecasts are going to be the most accurate and this is what you should be looking at before you decide to head down to your boat. Then, before setting off on your journey, get the latest forecast as published by the marina.  Remember too, that the weather you’re feeling inside the marina will often bear no relation to what’s actually going on at sea.

This has been another Captain Corbett’s Adventure.  If I’m not on Jersey teaching a private tuition Day Skipper theory or Yachtmaster theory course, then I’m either spending time with someone on their boat, giving them the confidence to take their boat out with their family and friends on board or I’m off somewhere exotic delivering a boat. Either way, I’ll write it up and put it on the Blog for you all to see, so keep popping back to see my most recent adventures.