Tack when by the lee

   RRS say
‘Tack, Starboard or Port A boat is on the tack, starboard or port,
corresponding to her windward side.’

Therefore by the definition it is the gunwale the wind blows over that determines the tack, and a boat BTL can flick from port to starboard without the boom changing side.

However I have seen some net posts saying it is the boom side which I feel is wrong however would make interpretation much easier. A observer would find it difficult to spot a boat was BTL especially if the sail is wet and telltales not working very well. 

Author	Message Share Topic Printable Version Delicious Digg Facebook Furl Google MySpace Newsvine reddit StumbleUpon Translate Twitter Windows Live Yahoo Bookmarks Topic Search Topic Options Post Reply Create New Topic
tink Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 23 Jan 16 Location: North Hants Online Status: Offline Posts: 789	Post Options Post Reply Quote tink Report Post Quote Reply Topic: Tack when by the lee Posted: 16 May 21 at 6:44am
	RRS say ‘Tack, Starboard or Port A boat is on the tack, starboard or port, corresponding to her windward side.’ Therefore by the definition it is the gunwale the wind blows over that determines the tack, and a boat BTL can flick from port to starboard without the boom changing side. However I have seen some net posts saying it is the boom side which I feel is wrong however would make interpretation much easier. A observer would find it difficult to spot a boat was BTL especially if the sail is wet and telltales not working very well.
	Tink https://tinkboats.com http://proasail.blogspot.com

MartinG Send Private Message Find Member's Posts Newbie Joined: 18 Oct 12 Location: Oxford Online Status: Offline Posts: 15	Post Options Post Reply Quote MartinG Report Post Quote Reply Posted: 16 May 21 at 7:31am
	But you need to look at the definitions of leeward and windward.
	49er 865 K6 159 RS800 1133 (sold)

sargesail Send Private Message Find Member's Posts Really should get out more Joined: 14 Jan 06 Location: United Kingdom Online Status: Offline Posts: 1459	Post Options Post Reply Quote sargesail Report Post Quote Reply Posted: 16 May 21 at 11:47am
	Exactly MartinG. In The RRS in the definition Tink quotes the word windward is in italics, indicating that the term is defined. Reference to that definition resolves Tink’s confusion.

JimC Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662	Post Options Post Reply Quote JimC Report Post Quote Reply Posted: 16 May 21 at 11:53am
	Yes, I suggest everyone has a bookmark to the definitions in their rules book. Its just as important as the actual Part C rules.

GML Send Private Message Find Member's Posts Groupie Joined: 24 Jul 11 Online Status: Offline Posts: 94	Post Options Post Reply Quote GML Report Post Quote Reply Posted: 16 May 21 at 12:54pm
	Buy the RYA version and you don't need a bookmark as the definitions are immediately inside the front cover (precisely so that you can find them without having to hunt for them).

tink Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 23 Jan 16 Location: North Hants Online Status: Offline Posts: 789	Post Options Post Reply Quote tink Report Post Quote Reply Posted: 16 May 21 at 5:25pm
	Thanks one and all, I knew my logic was flawed but hadn’t deleted deep enough. Leeward and Windward A boat’s leeward side is the side that is or, when she is head to wind, was away from the wind. However, when sailing by the lee or directly downwind, her leeward side is the side on which her mainsail lies. The other side is her windward side. When two boats on the same tack overlap, the one on the leeward side of the other is the leeward boat. The other is the windward boat.
	Tink https://tinkboats.com http://proasail.blogspot.com