“P” (The luff length of the mainsail, measured along the aft face of the mast from the top of the boom to the highest point that the mainsail can be hoisted or black band)

“E” (The footlength of the mainsail, measured along the boom from the aft face of the mast to the outermost point on the boom to which the main can be pulled or to the black band)

“J” (The base of the foretriangle measured along the deck from the headstay pin to the front of the mast)

“I” (Measured along the front of the mast from the genoa halyard to the main deck. The main deck is where the deck would be if there were no deckhouse)

“STL” (As per IRC certificate)

“ISP” (Measurement along the front of the mast from the spinnaker halyard to the main deck)

“SPL” (Length of the spinnaker pole)