Section 18 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof 90 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof 90 14 Direction finding compasses; navigational instruments/appliances, nes 90 14 90 Parts and accessories for direction finding compasses; other than navigational instrumen Commodity Code Description 90 14 90 00 Parts and accessories for direction finding compasses; other than navigational instrumen