18-3 Installation: The display unit
Select a position for the display unit:
•At least 4” (100 mm) away from the compass, at least 12” (300 mm) away from any radio transmitter and at least 4 ft (1.2 m) away from any antenna.
•Easy to read and operate. If possible, mount the display unit in front of the navigator or to the right of the navigator because the LCD display is more readable from these positions.
•Not exposed to the direct sun or water and protected from physical damage during rough sea passages.
•Easy to access the power source and convenient to route the transducer cables.
There are two mounting arrangements:
1 Flush Mounting
Requires a solid panel with access behind for wiring and mounting screws. After flush mounting, the display unit cannot be tilted or moved after installation to reduce any unwanted glare or reflections. Carefully select the best viewing position before installation. This would generally be in a shaded area.
1Cut a hole in the bulkhead for the display unit using the flush mount template.
2Drill four holes for the mounting studs using the flush mount template.
3Screw the four studs into the brass inserts in the back of the display unit.
4Sit the display unit in place and fit the washers and nuts to the studs.
2 Bracket Mounting
Requires a panel for mounting the bracket. Ensure that the panel is not likely to deform and is not subject to excessive vibration. The bracket can be tilted and rotated. The display unit can be removed when it is not in use.
1Hold the bracket in place and mark the screw holes.
2Drill the screw holes and screw the bracket in place. Do not overtighten the screws or the display unit might not rotate.
3Hold the display unit in place on the mounting bracket shaft. Hand tighten the knob on the mounting bracket.
Mounting bracket
Knob
Northstar Explorer 657 Installation and Operation Manual | 77 |