Sailmaker Ounce (smoz)
Sailmaker Ounce (smoz) :
A traditional unit measuring the weight (per unit area) of sailcloth. The weight in sailmaker ounces is the weight in ordinary (avoirdupois) ounces of a piece of cloth 36 inches by 28.5 inches. Thus 1 smoz is equal to 1.263 ounces per square yard (oz/yd2) or 42.828 grams per square meter (g/m2 or gsm). However, spinnakers (the large triangular foresails of yachts) are traditionally named by the fabric weight before it is finished, so these names do not correspond exactly to the sailmaker-ounce weights. A "half-ounce" spinnaker, for example, has a weight of about 0.85 smoz or 37 gsm, and a "three-quarter-ounce" spinnaker has a weight of about 1 smoz
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