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Originally Posted by WeeBubba
OLC
in your video tutorial you recommend a zero bearing when calculating the speed by watching the ship pass the periscope marker bow to stern.
sometimes it would be better for me to do this when i have the ship not at zero bearing but at 320 for example.
if i am measuring the speed not at zero bearing then what must i take into consideration?
thanks
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In that case you must move as slowly as possible. Zero speed is not recommended because you might drift to one side or another, so set speed for 0.5 knots to keep your boat in a straight line. Then you can time the target across the 320 line, or whatever, and your measurement will be accurate enough.