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Mark to starboard

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Henmch View Drop Down
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Post Options Post Options   Quote Henmch Quote  Post ReplyReply Direct Link To This Post Topic: Mark to starboard
    Posted: 16 Aug 19 at 1:15pm
two similar dinghies A & B are rounding a leeward mark which has to be left to starboard.
On entering the zone A is nearly two boat lengths ahead of B.
A does a poor rounding ( not close to the mark) and about a boat length after rounding tacks onto port. They have completed their tack by the time B rounds the mark. B does a much closer rounding than A and stays on Starboard tack and calls starboard on boat A.
Boat A contends that they were keeping clear but boat B altered course in the action of rounding the mark and so they were unable to keep clear.
Discuss.
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JimC View Drop Down
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 16 Aug 19 at 1:20pm
16.1 When a right-of-way boat changes course, she shall give the other
boat room to keep clear.
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ohFFsake View Drop Down
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Post Options Post Options   Quote ohFFsake Quote  Post ReplyReply Direct Link To This Post Posted: 16 Aug 19 at 4:43pm
Was there contact?

If B altered course and immediately made contact with A it would seem a very clear case of 16.1. B is not obliged to anticipate or take account of A altering course as she rounds the mark. Even if A was still tacking B cannot alter course in order to hit her.

If A was able to avoid B despite them changing course then by definition A must have given her room to keep clear, so no rule broken..

If B, altering course has to adjust or delay her manoeuvre in order to avoid A then she is obliged to do so in order to initially give room to keep clear. Again no rule broken.

The only other scenario I can see is if B rounded up onto a steady course and came into conflict with A a few seconds later, with B having made no attempt to avoid in the intervening time. From the description there doesn't seem to have been space for this to have happened in this case.

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Brass View Drop Down
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Post Options Post Options   Quote Brass Quote  Post ReplyReply Direct Link To This Post Posted: 16 Aug 19 at 9:41pm
Originally posted by ohFFsake

Was there contact?

If there was no contact, then B gave A room to keep clear unless A only kept clear by an unseamanlike action or a miracle.

If B altered course and immediately made contact with A it would seem a very clear case of 16.1. B is not obliged to anticipate or take account of A altering course as she rounds the mark. Even if A was still tacking B cannot alter course in order to hit her.

If A was able to avoid B despite them changing course then by definition A must have given her room to keep clear, so no rule broken..

If B, altering course has to adjust or delay her manoeuvre in order to avoid A then she is obliged to do so in order to initially give room to keep clear. Again no rule broken.

B acquires right of way because of A tacking.  Rule 15 does not require B, initially to give A room to keep clear.  It's only rule 16.

The only other scenario I can see is if B rounded up onto a steady course and came into conflict with A a few seconds later, with BA having made no attempt to avoid in the intervening time. From the description there doesn't seem to have been space for this to have happened in this case.

Rules are straightforward.  Detailed facts are needed to get the rules application right.



Edited by Brass - 16 Aug 19 at 9:48pm
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Post Options Post Options   Quote ohFFsake Quote  Post ReplyReply Direct Link To This Post Posted: 16 Aug 19 at 11:10pm
There I was thinking I'd broken it down into simple, clear steps, and once again Brass manages to make it clearer and simpler!
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Post Options Post Options   Quote Brass Quote  Post ReplyReply Direct Link To This Post Posted: 16 Aug 19 at 11:13pm
And I thought I was pointlessly nitpicking <g>.
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