The scale in the binoculars refers to bearing, of course. Your point is well taken. Zero refers to the heading of the boat, and the bearing is in relation to this, not the compass. So putting the boxed compass marking would be confusing, as they wouldn't refer to the magnetic compass but the ship's heading
I still feel that the person scouting the horizon would know within a degree or two where he was looking.
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Irish1958
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