Are those 4 seperate discs, or just 2 of which the top is a (partial) see-through? If the latter, what is the relation between 90 degrees and (about) 1.93 degrees/minute?
[edit] I think I allready figured out the last question. The anglular rate per minute when moving at 1 knot at a distance of 1k yards. Correct?
Last edited by Pisces; 08-06-09 at 12:02 PM.
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