A quick question on this topic:
When you see 150% Genoa (or 100% Jib) for example, what does this mean?
My understanding is that a 100% sail goes as far back as the mast, a sail of greater than 100% goes from the forestay to past the mast. So a 150% Genoa would go past the mast half the distance than from the forestay to the mast.
I asked a sailor at the marina this question a couple of weeks ago and he told me that the numbers were the sail area (a 150 Genoa was 150 sq ft etc.) I didn't think this was the case, but I thought I would find the answer here.
1989 Hunter 30'
Southern Georgian Bay
'Nautai te salutamus!'