At all times, either computer can be selected by the show operator via a simple change-over switch, thus affording the utmost reliability and safety.

Firstly, if you run out of gas the vehicle will run on petrol just by flicking the change-over switch whilst on the move or stationary.

Once the target was roughly centred in the sight, the change-over switch was thrown and the sight started rotating to track the target.

Includes depth under keel (m. or ft.) adjustable navigation alarm, anchor watch alarm, depth tendency indicator, m/ft change-over switch.

All the measurements were taken using the same goniometer, the feeders from the various antennae elements being selected by the operator, using buttons operating a remote, motorized set of change-over switches.