Pattern no.182 Mod. Boat's compass
Pattern no.182 Mod. Boat's compass
This type of Boat's Compass and all metal binnacle came into use in the Royal Navy during the Great War (1914-18) and was afterwards adopted as the standard type of Boats' Compass, superseding Pattern 20 (inventory number 1933-488).
It is a liquid compass fitted with an expansion chamber of the Hammersley type at the base of the bowl.