Performance standard for magnetic compass
Performance standard for magnetic compass Compass Card:Graduated in 360 degrees.Numerical indication at every ten degrees.Cardinal point indication by capitial letters N, E, S and W.North point indication by suitable emblem.Directional error should not exceed 0.5° on any heading.Clearly readable at a distance of 1.4 m.Magnifying glass is permitted. Materials:Corrector magnets for parmanent magnetism should have … Read more