Hydrographic Station Pointer in Wooden Case, Nautical P-63 It is about 3/4 inch

It is about 3/4 inch thick

This instrument was likely removed from an Army Helicopter

and C-7A Caribou

The indicator appears to be new old stock and never installed

Hydrographic Station Pointer in Wooden Case, Nautical P-63 It is about 3/4 inchThis Hydrographic Station Pointer was used in coastal navigation to determine the position of a sea going vessel and to chart coastlines. It consists of a fixed arm secured to a brass circle and two movable arms that can be adjusted to angles determined by a sextant. Three arm extensions are in included in the kit. More about how it was used can be found here. Although not specifically labeled, we believe it to have been manufactured by Kelvin and