luffing another boat downwind
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Forum Name: Beginner questions
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URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=5755
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Topic: luffing another boat downwind
Posted By: ellistine
Subject: luffing another boat downwind
Date Posted: 28 Jul 09 at 10:12am
Was racing last night in quite a lot of wind. On the
downwind leg we we're sailing next to an RS200 at the
same speed. We both had our kites up and we were to
leeward.
Ordinarily we would have gone out on the wire and use the
leverage to head up higher but the 200 was in our way.
Afterwards somebody said that we should have gone higher
and the 200 would have to keep clear.
If this is the case, what could he do? He wouldn't be
able to head up as he would be over powered and he
couldn't bear away as we were in the way.
Would he really be expected to drop the kite and get out
of our way?
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Replies:
Posted By: JimC
Date Posted: 28 Jul 09 at 10:33am
Originally posted by ellistine
Would he really be expected to drop the kite and get out of our way? |
There are subtleties based on how the overlap was established, but fundamentally he's required to keep clear. If he has to drop the kite to do it, so be it, but you can usually do things like really hammer in the kite and stall it out to slow down and get Leeward ahead of you, should that bewhat you need to do.
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Posted By: Scooby_simon
Date Posted: 28 Jul 09 at 10:49am
Originally posted by JimC
Originally posted by ellistine
Would he really be expected to drop the kite and get out of our way? | There are subtleties based on how the overlap was established, but fundamentally he's required to keep clear. If he has to drop the kite to do it, so be it, but you can usually do things like really hammer in the kite and stall it out to slow down and get Leeward ahead of you, should that bewhat you need to do. |
Agreed. If needed, they do need to drop the kite.
------------- Wanna learn to Ski - PM me..
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Posted By: ellistine
Date Posted: 28 Jul 09 at 10:54am
That's just got bad news written all over it!
He wouldn't be able go low to drop the kite as I'm in the
way so would have to drop it whilst fully powered up.
I think if it happens again I'll try the stalling the kite
thing and head up behind them.
As it was we both did a synchronised gybe and capsize.
Luckily we got our boat back up quicker and stayed ahead.
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Posted By: olly_love
Date Posted: 28 Jul 09 at 11:17am
in that situation pre planning is the best and try not to go below somone. the chances are you wont get past and will then be stuck there. if that happens then no matter if you try to push them up they will prob get overpowered first then capsize on u or have to bear away. if there kite hits you then it may be your fault for not giving them sufficent room. but gybing off if a good option.
it is depressing sitting stuck in someone elses rubbish wind
------------- TWO FRANK-Hunter Impala
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Posted By: ellistine
Date Posted: 28 Jul 09 at 11:35am
Originally posted by olly_love
in that situation pre planning is the
best and try not to go below somone. |
Unfortunately they we're passing us to windward but then we
got sorted and we're traveling at the same speed.
You're right though, a gybe would have been a good option.
So much to think about!
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Posted By: timnoyce
Date Posted: 28 Jul 09 at 11:48am
I agree with Olly. When you round the windward mark you need to look to see what the other boats are doing. Bear in mind that symetric boats and most single handers will probably soak so will head straight for the leeward mark, and asymetrics will head off at an angle.
In this case you could have gybed away into free wind or waited before hoisting the kite to give you the chance to get over on top of the 200. Bear in mind that if its a windward leeward course you really want to be heading dead downwind, so dont head off on a reach trying to get over the top of all the boats, you need to be sensible about it! Being stuck under another boat is hugely frustrating as you realise, specially when you would normally be able to head up and have a proper fun reach downwind, but instead have to sit on the side wishing they werent there!
------------- http://www.facebook.com/bearfootdesign - BEARFOOT DESIGN
Cherub 2648 - Comfortably Numb
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Posted By: ellistine
Date Posted: 28 Jul 09 at 12:21pm
Originally posted by timnoyce
Bear in mind that if its a windward
leeward course you really want to be heading dead
downwind, so dont head off on a reach trying to get over
the top of all the boats, you need to be sensible about
it!
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It's a good point. It was a good 22kts last night gusting
28 on a windward leeward asymmetric only race. Even when
going low as we could we were still planing.
As we were the only trapeze boat am I right in thinking
that it would still be an advantage for us to head higher
than the other boats and engage warp drive or does the
apparent wind thing not apply so much in such strong
winds?
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Posted By: timnoyce
Date Posted: 28 Jul 09 at 12:26pm
Its always worth while heading up and engaging warp drive. Whats the point in going out if you're not going to enjoy yourself?!
As far as apparent wind, the effect is obviously still there regardless of the wind strength. You will just have the wind further round towards the stern than on the beam... hence why you were able to run much deeper than usual but still planing. Don't forget that symetric boats plane on a dead run when it is breezy (its just a much more wobbly experience than broad reaching), so its not a phenomenon which only happens to asymetrics. You just need to sail by feel, going as low as you can in the gusts, and heading up in the lulls to keep the boat moving fast. (although in 22-28knots you shouldnt have any problem with that!)
------------- http://www.facebook.com/bearfootdesign - BEARFOOT DESIGN
Cherub 2648 - Comfortably Numb
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Posted By: Scooby_simon
Date Posted: 28 Jul 09 at 12:53pm
Originally posted by ellistine
That's just got bad news written all over it!
He wouldn't be able go low to drop the kite as I'm in the way so would have to drop it whilst fully powered up.
I think if it happens again I'll try the stalling the kite thing and head up behind them.
As it was we both did a synchronised gybe and capsize. Luckily we got our boat back up quicker and stayed ahead. |
Nope; in theory, and I've not seen a Case YET on this. If he says "I need room to bear off to take the kite down to ALOOW YOU to then luff me further", you have to give him the room to take the kite down and then come back up!!!
This does however opena large can of worms as how long SHOULD it take to drop the kite adn then head back up! At what windspeeds should you expect a certain type of boat to be able to luff, collapse the kite and not break someting / capsize?
In a few kts of wind I can tack with my kite up; 1 kts more and I'll just blow over!
------------- Wanna learn to Ski - PM me..
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Posted By: Noah
Date Posted: 29 Jul 09 at 12:17pm
I find it incredible that the rules effectively grant the give way boat temporary right of way to get themselves into shape to give way. I'm not aware that RoW has to give 'room' to the GW boat, only 'time and opportunity' to keep clear. Having been given time & opportunity GW has to give RoW room to sail their course.
What happens if the kite from w/w touches l/w during the drop? Who is at fault then?
In the situation described, I would have thought that w/w has to give room to l/w to sail their course, even if w/w has to flog or stall their kite to do so.
------------- Nick
D-Zero 316
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Posted By: rogerd
Date Posted: 29 Jul 09 at 4:59pm
In my experience any luffing match just lets the rest of the fleet sail on. Unless you need to slow said boat (and yourself in the process) for tactical reasons best to avoid the situation.
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Posted By: JimC
Date Posted: 29 Jul 09 at 6:20pm
Originally posted by Noah
In the situation described, I would have thought that w/w has to give room to l/w to sail their course, even if w/w has to flog or stall their kite to do so. |
Oh yes, exactly so. But what L is not allowed to do is to "ambush" them so that its impossible for them to respond.
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Posted By: Scooby_simon
Date Posted: 29 Jul 09 at 7:56pm
Originally posted by Noah
I find it incredible that the rules effectively grant the give way boat temporary right of way to get themselves into shape to give way. I'm not aware that RoW has to give 'room' to the GW boat, only 'time and opportunity' to keep clear. Having been given time & opportunity GW has to give RoW room to sail their course.
What happens if the kite from w/w touches l/w during the drop? Who is at fault then?
In the situation described, I would have thought that w/w has to give room to l/w to sail their course, even if w/w has to flog or stall their kite to do so.
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Some Asyms boats CANNOT flog the kite without going swimming. If I let go of my KIte sheet when trying to go high I'll just fall in, if I go too high, I'll just fall in!
For me to drop the Kite, I need to come in off the wire (and thus bear off) and then drop the kite.
------------- Wanna learn to Ski - PM me..
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Posted By: Noah
Date Posted: 30 Jul 09 at 4:08pm
Whilst w/w is protected from a l/w ambush by the 2-lengths to leeward rule if the overlap is achieved from astern, in the OP situation l/w was rolled while getting up to speed, so it doesn't apply. IF this went to protest, I would expect w/w to have made some allowance for the fact that they made themselves g/w boat by going to w/w. The rules say that g/w does not have to anticipate any moves RoW makes (don't they?), but they put themselves there, so should suffer the consequences.
Scooby - I reckon you'd just have to slow / stop 'till l/w has gone through to avoid an infringement...
------------- Nick
D-Zero 316
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Posted By: ellistine
Date Posted: 30 Jul 09 at 4:36pm
Christ, I never knew this would get so complicated! At the
end of the day if I had gybed or slowed enough to head up
and pass I would still have got to the mark quicker than if
I had held the position I did. If I had tried to luff him
it could have taken even longer by the time he had conjured
some sort of trick to get out my way.
I can see why this would be useful in a finals race etc but
on a club handicap I suppose clear air is still king.
Interesting stuff though!
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Posted By: jeffers
Date Posted: 30 Jul 09 at 6:19pm
Originally posted by ellistine
I can see why this would be useful in a finals race etc but on a club handicap I suppose clear air is still king.
Interesting stuff though! |
Luffing as a weapon is only really any use when used against a boat in the same class or of similar performance to yourself. As you have rightly pointed out, clear air is king (especially on smaller inland waters).
------------- Paul
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D-Zero GBR 74
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Posted By: Scooby_simon
Date Posted: 30 Jul 09 at 7:02pm
Originally posted by Noah
Whilst w/w is protected from a l/w ambush by the 2-lengths to leeward rule if the overlap is achieved from astern, in the OP situation l/w was rolled while getting up to speed, so it doesn't apply. IF this went to protest, I would expect w/w to have made some allowance for the fact that they made themselves g/w boat by going to w/w. The rules say that g/w does not have to anticipate any moves RoW makes (don't they?), but they put themselves there, so should suffer the consequences.
Scooby - I reckon you'd just have to slow / stop 'till l/w has gone through to avoid an infringement...
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But the only way to stop IS to bear off and stop; down wind, on the wire with the kite up; 16-20kts in not unusual and when it all goes well much more. You simply cannot just "stop" a boat weighing 104kg with 32.5sqm sail up!! Once the windward hull is more than about 3 feet out of the water, you cannot go any higher (on bearing) without capsizing.
This is why I generally go below most things!!!! as I'm catching them at 10+kts!!!
------------- Wanna learn to Ski - PM me..
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Posted By: ColPrice2002
Date Posted: 31 Jul 09 at 12:04pm
It's generally good not to get caught up in luffing matches/ bumps of rapid takcs - they all slow you down!
Unfortunatley, when push comes to shove, you need to know which boat to hit first - or at least which boat should give way.
The Racing Rules (and indeed the Collision Regulations) are not written with specific examptions like "I was windard multihull, therefore I could not give way to a leeward boat - because I need to turn downwind to slow down".
Perhaps the multihuills should fly code flag "D" - or the "ball + Diamond + ball" for a vessel restricted in its ability to manoeuvre? Otherwise the assumption is that the normal rules will apply - and that can raise a significant risk of damage and injury.
Colin
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Posted By: English Dave
Date Posted: 31 Jul 09 at 2:16pm
Originally posted by Scooby_simon
But the only way to stop IS to bear off and stop; down wind, on the wire with the kite up; 16-20kts in not unusual and when it all goes well much more. You simply cannot just "stop" a boat weighing 104kg with 32.5sqm sail up!! Once the windward hull is more than about 3 feet out of the water, you cannot go any higher (on bearing) without capsizing. This is why I generally go below most things!!!! as I'm catching them at 10+kts!!! |
I sympathise, Simon, and it's all a bit tricky when you are single handed. I am getting strangely addicted to taking the Hurricane out on my own on Thursday nights but 10kts is about my limit at the mo. But when I club race (with crew) we are often set "butterfly courses" and choosing your line through a convoy of Lasers racing across your path is a constant hassle. It's quite common for me to have to let the kite flog and dump the traveller to avoid them and I'm surpised the same isn't possible for you. Although I do appreciate that you only have two hands and the mainsheet is probably lying cleated on the tramp. While you hold onto kite sheet and tiller.
------------- English Dave
http://www.ballyholme.com - Ballyholme Yacht Club
(You'd think I'd be better at it by now)
Hurricane 5.9 SX
RS700
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Posted By: Rupert
Date Posted: 31 Jul 09 at 4:43pm
The situation gets even murkier when an assymetric is overtaking to leeward in some breeze, and then the wind drops. His proper course is then to luff up to keep the kite filling. This is his proper course, which he would take if the other boat wasn't there. Therefore, theoretically, he isn't luffing (as in changing course to force another boat to keep clear, which he isn't allowed to do), so can he change course and force the windward boat to change course?
------------- Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Posted By: Scooby_simon
Date Posted: 31 Jul 09 at 11:46pm
Originally posted by English Dave
Originally posted by Scooby_simon
But the only way to stop IS to bear off and stop; down wind, on the wire with the kite up; 16-20kts in not unusual and when it all goes well much more. You simply cannot just "stop" a boat weighing 104kg with 32.5sqm sail up!! Once the windward hull is more than about 3 feet out of the water, you cannot go any higher (on bearing) without capsizing.
This is why I generally go below most things!!!! as I'm catching them at 10+kts!!! |
I sympathise, Simon, and it's all a bit tricky when you are single handed. I am getting strangely addicted to taking the Hurricane out on my own on Thursday nights but 10kts is about my limit at the mo. But when I club race (with crew) we are often set "butterfly courses" and choosing your line through a convoy of Lasers racing across your path is a constant hassle. It's quite common for me to have to let the kite flog and dump the traveller to avoid them and I'm surpised the same isn't possible for you. Although I do appreciate that you only have two hands and the mainsheet is probably lying cleated on the tramp. While you hold onto kite sheet and tiller.
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Dave
Differences are the following
1, Boat is 90kg (almost 50%) lighter than the Hurri 2, Your mainsail is only 2.5sqm bigger 15sqm vs 17.5) 3, Your Kite is only 3.5Sqm bigger (17.5 vs 21) 4, Dumping the traveller will only gain me 15-30 degrees and I'd have to lean in to get it if it has not washed out the back; Yes, usually it's all on the tramp
As I said; let the kite flog and you are usually swimming very quickly unless you BEAR OFF; the boat IS light!!!!
In order to be luffed any higher than I am already(so someone comes up from behind; I need to take the kite down or capsize on top of them. It's not "seaman like manner" to capsize!!.
If someone luffs I'll simply state "if you want me to avoid you in a seaman like way, I need to take the kite down. To do that I need to bear off, come in off the wire and take it down, this will take a few seconds, I'd suggest it would be far better if you gybed away. Do you intend to take me higher, if so, you need to bear off NOW to allow me to take the kite down, see R15" and see what happened!!!
15 ACQUIRING right of way
When at boat acquires right of way, she shall initially give the other boat room to keep clear, unless she acquires right of way because of the other boats actions.
To refresh ;
Room: The space a boat needs in existing conditions while manoeuvring promptly in a seamanlike way.
Comments Rule Guru's ??????
------------- Wanna learn to Ski - PM me..
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Posted By: English Dave
Date Posted: 01 Aug 09 at 8:46am
All points taken Simon. Like I said, I know it's difficult.
With regard to the rules, however, I think that the key phrase is "unless she acquires right of way because of the other boats actions."
Given that you are bowling along faster than the others, you will be "rolling" the leward boats as you scoot past. That gives them right of way from "your" actions and they can luff you without warning or room. However, their timing has to be spot on. At a speed differential of 5+ kts your will only be overlapped for a couple of seconds.
------------- English Dave
http://www.ballyholme.com - Ballyholme Yacht Club
(You'd think I'd be better at it by now)
Hurricane 5.9 SX
RS700
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Posted By: redback
Date Posted: 01 Aug 09 at 10:06am
I sympathise with Simon too, but you've got to give yourself lots of space if you sail that sort of boat in mixed company. I've been there in the 4000 when sailing at Bough Beech and there's been loads of kids in Toppers.
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Posted By: laser4000
Date Posted: 01 Aug 09 at 10:36am
Originally posted by Scooby_simon
If someone luffs I'll simply state "if you want me to avoid you in a seaman like way, I need to take the kite down.
15 ACQUIRING right of way
When at boat acquires right of way, she shall initially give the other boat room to keep clear, unless she acquires right of way because of the other boats actions.
To refresh ;
Room: The space a boat needs in existing conditions while manoeuvring promptly in a seamanlike way.
Comments Rule Guru's ??????
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Sure - I'd suggest that if you are unable to alter course either way without danger of capsizing and yet are in reasonable proximity to L then you are possibly not keeping clear under rule 11.
Remember that this is one of those few occasions in the rules where it is quite possible to penalise both L and W in the same situation - L for a rule 15 infringement and W for a rule 11 infringement, and it does happen reasonably frequently in a team race situation
I'll admit to not having watched cats racing but if you were sat in
front of me in a protest room trying to make that argument that you need room to bear away then I think
I might stuggle to see your point of view.
Is there any reason why you wouldn't just blast through to leeward anyway? Certainly in the 4K when coming across Laser's etc on crossing courses or even converging course, I'd always try to go to leeward and use the extra pace to ignore the windshadow - that way you always have freedom but going above can lead to the situation you've described.
Of coure the other situation is to only do open meetings....
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Posted By: Andymac
Date Posted: 01 Aug 09 at 11:01am
Originally posted by laser4000
Sure - I'd suggest that if you are unable to alter course either way without danger of capsizing and yet are in reasonable proximity to L then you are possibly not keeping clear under rule 11.
I'll admit to not having watched cats racing but if you were sat in front of me in a protest room trying to make that argument that you need room to bear away then I think I might stuggle to see your point of view.
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Totally agree.
Perhaps this should have been posted under the 'rules' column. A recent 'luffing' thread has just concluded, which gives a clear obligation for windward to 'keep clear'. Gordon suggested that more of us should make ourselves familiar with the definitions as well as the rules.
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Posted By: jeffers
Date Posted: 01 Aug 09 at 11:23am
Originally posted by Andymac
Totally agree.
Perhaps this should have been posted under the 'rules' column. A recent 'luffing' thread has just concluded, which gives a clear obligation for windward to 'keep clear'. Gordon suggested that more of us should make ourselves familiar with the definitions as well as the rules. |
Agreed, I think we have done this to death now (even if we don't all agree on it). Perhaps one of the admins could move the threat to the Racing Rules section?
------------- Paul
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D-Zero GBR 74
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Posted By: Scooby_simon
Date Posted: 01 Aug 09 at 2:16pm
Originally posted by English Dave
All points taken Simon. Like I said, I know it's difficult.
With regard to the rules, however, I think that the key phrase is "unless she acquires right of way because of the other boats actions."
Given that you are bowling along faster than the others, you will be "rolling" the leward boats as you scoot past. That gives them right of way from "your" actions and they can luff you without warning or room. However, their timing has to be spot on. At a speed differential of 5+ kts your will only be overlapped for a couple of seconds.
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I thinking in this case where I'm being over taken to leeward; Agree; IF I'M overtaking, then I'm stuffed!! Thus my earlier statement that I'll overtake to leeward.
------------- Wanna learn to Ski - PM me..
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Posted By: English Dave
Date Posted: 01 Aug 09 at 8:07pm
We race leadmines (mainly Sigma33) during club racing. As a
one design class they bunch and they have a big wind
shadow. You cannot allow yourself to go to leeward of them
with the kite up. Often I will delay the hoist in order to
climb to windward after a mark just to give myself room.
------------- English Dave
http://www.ballyholme.com - Ballyholme Yacht Club
(You'd think I'd be better at it by now)
Hurricane 5.9 SX
RS700
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Posted By: Scooby_simon
Date Posted: 01 Aug 09 at 8:51pm
Originally posted by English Dave
We race leadmines (mainly Sigma33) during club racing. As a one design class they bunch and they have a big wind shadow. You cannot allow yourself to go to leeward of them with the kite up. Often I will delay the hoist in order to climb to windward after a mark just to give myself room. |
Which would hopefully solve the problem. I get a big gust I can be bearing off 40 degrees!!!
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Posted By: redback
Date Posted: 01 Aug 09 at 10:20pm
Well in a Laser 4000 I'd have to bear away more than 40 in the sort of conditions we sail in on the Medway sometimes. But to come back to passing people to leeward. Sadly fast asymmetrics are fast in plenty of wind but in a wind shadow they can be slower then some quite slow boats. hence I have a guideline you might like to share. If its windy pass to leeward, if its not windy pass to windward. Make this decision early enough and you can get enough separation from the slow boat. With a big asymmetric like the 4000 I have to be very wary of the smaller (none apparent wind) boats like an RS200 or Laser2000 because they can luff even in the gusts. Similarly to pass to leeward of a boat like a Wayfarer requires quite a lot of separation since they have a wind shadow equivalent to a block of flats!
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