User's Manual

57Northstar Explorer VHF Series: 721/725 Operation and Installation Manual
Section 7 - Install the Explorer 721/725
7-1 Installation Options
There are two ways to install the radio. You can choose:
• a deck or overhead mounted gimbal installation. The reversible mounting gimbal is fixed to a
suitable site and the radio is placed into it. The radio can be removed for storage and the viewing angle
can be adjusted.
• a recessed installation. The radio is recessed into a cavity cut into a bulkhead. The radio fixture is
permanent and the viewing angle cannot be adjusted.
NOTE: An optional handset with a 9.8` (3 m) docking cable included can be purchased and connected to
your Explorer 721 base unit to give second station operation and intercom capability.
7-2 Location Requirements
Please check these BEFORE doing any cutting or drilling.
Whichever installation method you choose, ensure that the chosen location:
• isatleast3'(1m)fromtheantenna
• allowseasyconnectionto(atleast)a10Ampfused13.6VDCelectricalsourceandtheantenna
• isatleast1.5'(45cms)fromthecompasstoavoidcreatingmagneticdeviation of the compass
during radio operation
• hasasuitablespaceclosebyforinstallingthemicrophonebulkheadmount
• provideseasyaccesstothecontrolsonthefrontpanel
• providesreasonableaccesstothewiringatthebackoftheradio
• providesenoughroomtoxtheDSCwarninglabel(721/725USonly).
The VHF721/725 has a large FSTN LCD
screen with an optimum viewing
angle of approx. +/-20 deg. Ensure the
chosen location provides a suitable
view of the display. Ideally, the user
should be directly in front of the
display or no more than +/-20 deg
from the front of the display.
Note: If unsure, temporarily power
up the radio and check for a suitable
location.
20˚
20˚
20˚
20˚
Side
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