Old as Dirt!
Join Date: Nov 2008
Location: Tampa Bay Area
Thanked 139 Times in 132 Posts
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Hays--In your effort to learn to sail it would be wise to take some of the Cost Guard Auxillary classes and particularly, in this case, the class on coastal piloting and navigation. You might also amble over to the West Marine store (there's no shortage of those in the Bay Area) and pick up one of the books on the subject.
At the scale of the Chart's you're using for sailing in the Bay, using the distance scales on the bottom corner of the chart (which I guess are chart-kits) is perfectly adaquate for measuring purposes. The "10ths" scale on the left side of the scales is to allow you to step off distances with a divider. First set to a whole measure of miles (nautical or statute) which is walked off along a course line and then, the last distance measured on the 10th's scale. Knot meters/logs and GPS devices are normally graduated in knots or nautical miles hence the nautical mile scale is normally the most useful for your speed/distance/time computations. For the sake of convenience, remember that a 10th of a mile is about 200 yards.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."