Quote:
Originally Posted by tomoose
Can you confirm whether the mast height in question is from the water surface or from the main deck to the top of the mast.
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The mast head height is the height above the waterline, but it's really not important which bit you measure, as long as you have an accurate measurement for it in feet. You can measure the waterline to the top of the bridge structure if you want, if you know how high it is. The taller the thing you are measuring though, the less error there will be in the measurement, except of course if you can't see the top of the thing you are measuring.