Colregs - definition of length

[Seagreen]

OK, transferring this from the PBO forum,..

When in the colregs, they specify a boat's maximum length, do they mean absolute maximum, or length over fixed gear?

I've a long running bowsprit - adds an extra 12 feet to my length - but does this count as "length" or as it is a moveable item (runs in and out), does not? Not bothered by the outcome, except I may have inadequate lights.

 

[SwedishLass]

Definition of length is given as LOA. So assuming in use then it counts and you will need app lights. (Things we look up when the weather is _____ (insert suitable word). No point in having a second set to allow for shrinkage.
At least you can gain satisfaction by depriving marina owners of 4 Metres.

 

[johnchampion]

The colregs state that length is LOA. The question of course is what is LOA?

There are lots of "lengths" eg. Tonnage length, Registered Length, Freeboard Length, Lloyds Length and of course our LOA. Some of these are the same as others, some not!

The only definition I can find for LOA at the moment is "the total length from the foreside of the uppermost extremity of the stem to the the aftermost limit of the stern" (Source Browns Practical Pocket Guide for Merchant Seaman 1962).

Still doesn't answer whether the bowsprit is part of the stem for the purposes of the colregs and therfore LOA or not though.

I think I'll go and lie down.

 

[johnchampion]

I'm beginning to wish I hadn't started on this now. I found another definition which is to do with fishing vessels in Alaska, (now I know that may be somewhat removed from most of us but hey ho) which is a US Federal definition and states

"Length overall (LOA) of a vessel means the horizontal distance, rounded to the nearest foot, between the foremost part of the stem and aftermost part of the stern, excluding bowsprits, rudders, outboard motor brackets, and similar fittings or attachments. . . .
The term “foremost part of the stem” constitutes a starting point and the term “aftermost part of the stem” constitutes an end point for measuring LOA. These terms, however, are not clearly defined in regard to bulwarks extending above the main deck. Nor are universally recognized standards in use among all maritime industries, shipwrights, and Federal regulators."

I had always thought that LOA was the same as this i.e. excludes overhanging spars etc, but who knows - probably the learned judge in the mercantile court when you are making your case as to why you ran down the supertanker but not a lot of others.

Why don't you just saw bits off until you are under 7 metres - makes life much easier

 

[oldharry]

.... and Harbour Masters length: the distance from the outer edge of furthest forward projecting part of the boat to the outer edge of the aftermost aft projecting part. Used for calculating 'harbour dues' - in itself a questionable levy in many cases!

 

[Peterduck]

Well, I wonder, are the lights there to satisfy the regulations, or are they to stop other ships from colliding with mine? If it is the former, then skimp all you like. In my case, it has always been the latter, so I have made my lights as big and bright as I can. The nav lights on 'Swallow' have lenses that are about 4 inches high and wide, mounted in cast bronze bodies.
Peter.

 

[dlovelock]

The MCA's instructions for taking measurements for the UK Small Ships Register are quite clear that LOA is measured on deck, not over spars extending beyond.

 

[Woodentop]

LOA - a wonderful subject;

For COLLREGS;
Use the perpendiculars of the hull - ie the box it would fit in with all spars and rudders removed.

For MARINAS;
Add the bowsprit and davits over the stern.

For BROKERS;
Use Marina length plus the thickness of the paint or varnish, rounded up to the nearest foot.