RM PRODUCTS Military Triangle ProtractorOriginally developed as a ROTC classroom protractor now available to the public. Scales 1:25,000, 1:50,000, 1:100,000 and 1:250,000 meters.Features of RM PRODUCTS Military Triangle Protractor Map protractor Map reading and land navigation aid Classroom protractor Scales 1:25,000, 1:50,000, 1:100,000 and 1:250..