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Subjects>Auto>Boats and Watercraft

What does a boat's J mean?

Anonymous

∙ 15y ago

Updated: 12/12/2022

the J dimension of a sailboat is the length from the forestay attachment on the deck to the mast.

for sizing a headsail (jib/genoa) a 100% jib would have an LP (or approximately foot) of J, a #1 jib would have a 155% the length of J.

Wiki User

∙ 15y ago

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