Measuring Guide

• "J" - the distance from the front of the mast to the spot where the forestay meets the deck.

• "I" – the distance from the deck  to the top of the forestay.

• "P" – the distance from the top of the boom to the main halyard sheave, or the black band if your boat has one. This is best measured by hoisting a tape to the correct height and then reading the distance where the tight tape measure intersects the boom.

• "E" – the distance from the rear of the mast to the clew outhaul fitting when fully extended, or the black band.