Direction finding compasses, magnetic and gyro compasses used to find heading on land, sea and air.

State type (magnetic, gyro), accuracy and damping, and keep clear of magnets; marine compasses may need approvals. Measuring and survey instruments are precision goods: pack in padded cases with silica gel, state accuracy class, range and resolution, provide calibration certificates traceable to national standards, CE/BIS marks for electronic units, and keep lithium batteries under dangerous goods rules; some navigation and geophysical instruments are export controlled.