[frers-list]Air Draft

John Aquino frers-list@lists.frers33.com
Wed, 6 Jul 2022 07:34:50 -0400


As I passed under the Sakonnet River Bridge which reports 65 feet of 
vertical clearance I was contemplating the air draft which I do not know 
precisely.

The I dimension is 45 feet. Using the diagram at sailboatdata.com I 
estimated that the ratio of the length from the masthead to the water 
line is 5/4.1. This yields a distance from the waterline to the masthead 
of just under 55 feet (54.88 feet). To that I would need to add the 3.3 
feet for the Garmin wind transducer to obtain 58.3 feet.

Is the 55 feet to the mast head plus antenna and wind instruments 
similar to other owners' estimates?

Thanks.

John Aquino
Moose