FinchOU, No, of course the bearings were mag north related bearings which could then be converted to true north related bearings by the correct application of mag variation at the nav station or, if you knew the variation for your area, then by applying that to your reading from the bearing compass in the binoculars.
The bearing compass in the binoculars tells you nothing about the heading of the ship but rather only the MAG direction of an object which you are sighting. The reciprocal of this bearing line gives your direction from the object. Two of these lines crossed gives you a position fix........most useful in coastal pilotage or for those SH 5 KLs who are complaining about running aground using Real Navigation to update their DR.
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