True-course finder
1876
Decca decometer
1959-1969
Direction finding (DF) receiver
1953-1963
"Trident" electric log
1861-1873
Projection Moving Map
Star Finder and Identifier
1942
Ferranti Inertial Navigational Unit
1960-1980
Navigation light indicator
1944-1954
"Trident" chart house receiver
1861-1873
Engine direction indicator with rotary switch
1953-1954
Course-to-Steer box
1950-1954
Chart comparison unit, type C.Y.5 no. 13
1945-1954
Gyro-magnetic Compass
1930-1947
Elliptical shaped brass navigational instrument with glass viewing window, half mirrored, in leather case .
1880-1940
Q.E. Corrector/A.E. Matching Unit
1962-1963