Display units
The main display units should be sited on the bridge from which the ship is normally navigated. The following are some of the factors that should be borne in mind when selecting the most convenient site for the unit:
- Compass safe distances.
The permissible separation of the unit from magnetic compasses may dictate the site.
- Lighting.
The small amount of light issuing from the display unit may be enough to interfere with visual lookout when the bridge is in darkness; and there will be occasions when additional light is needed at the display unit either for comparison of the display with a chart or for running repairs to the unit. Conversely, there may be times when ambient light on the bridge is too strong for effective viewing of the display. Difficulties such as the foregoing may be overcome by the use of display visors.
