WWII Admiralty Pattern Mk II Cased Inspectors Clinometer


A very fine quality WWII period, Admiralty Pattern MK II Inspector's Clinometer, able to measure very small variations in angle, up to 45°.

The Clinometer consists of a bronze frame containing a highly sensitive cylindrical screw, graduated to minutes of a degree of angle. There is also a spirit level, to set on horizontal. Apart from the cylinder, the rest is covered in a black finish. The top of the drum is stamped CLINOMETER INSPECTOR’S MK II 1938 No. 251 E.R. WATTS & SON, LONDON. The clinometer comes in a mahogany fitted case. Both the clinometer and case are in very good condition.

This instrument was used for measuring the stability and safety of a ship by measuring the angle of roll of a ship, when weights were moved laterally on the deck. The very minor changes of angle would determine how likely a ship was to capsize in rough seas. The bronze frame has two surfaces at right angles enabling any slope between 0 and 90 degrees to be measured, between 45 and 90 being accomplished using the upright face and subtracting the angle read from 90 degrees. divided to five minutes of arc. The clinometer was made by Edwin Watts, better known for his compasses.

Size inclinometer: 20 x 7.5 x 14 cm (7 7/8 x 3 x 5 ½ inches)
Size case: 31.5 x 23 x 11 cm (12 ½ x 9 x 4 ¼ inches)
Weight: 5355 g