METHOD OF MEASURING COMPASS DIRECTION OF COUNTER SHIP FOR PREVENTING COLLISON OF LARGE SHIP

摘要

A method for preventing collision between large ships under way involved drawing a schematic by measuring the length(L) from the center(O) of the compass to the prow of the on-going ship allowing the azimuth of the counter ship to be measured. The principle employed was that the triangle OBC was similar to the triangle OFF owing to ∠BOC=∠EOF=common angle, EF//BC, overline(DE) / overline(OB) = overline(EF) / overline(BC).