Course indicator

Mountbatten station keeping gear. Instructions and working diagrams on five linen scrolls:
1) Two pointer equipment, distance corrector and engine speed indicator.
2) Single pointer equipment and distance correction and engine speed circuits.
3) Single pointer equpiment - complete Mountbatten installation.
4) Two pointer equipment - complete mountbatten installation
5) Mountbatten station keeping system - theory of the station keeping clock; and distance correction dials.