Humminbird 1155C - Manual (Page 23)

GPS Receiver Installation
To optimize performance of the GPS receiver, mount it in an area that has full exposure to the sky. The
effective area of reception is 10° above the horizon. Different circumstances determine the mounting
method appropriate for your GPS receiver.
If you have… Then use:
The pinouts of the NMEA cable are as follows:
• Red Wire, +12V (output voltage only)
• Black Wire, Ground
• White Wire, NMEA Out.
CAUTION! Please use caution before connecting the red +12V wire to any other NMEA device. This is an output
voltage provided by the control head and GPS receiver and should only be connected to those NMEA devices that
need a 12 volt input.
Stem Mounting with an Existing 1" - 14 Thread Stem
Follow these steps to stem mount the GPS receiver:
NOTE: If you have an existing stem for mounting the GPS receiver, proceed directly to step 2 of the following
procedure.
1. Determine the best location to mount your GPS receiver. Preplan and test the cable routing to
your control head before any drilling or cutting of your boat surfaces. If you have purchased
hardware to stem mount your GPS receiver, follow the instructions included with that hardware
to mount the stem (antenna pole).
NOTE: AS-EC10 10' extension cables are available from Humminbird® if your planned routing exceeds 20', (6 m).
Maximum cable length, including extensions, should not exceed 50' (16 m).
NOTE: Remember to seal screw holes and drilled holes as needed with marine-grade silicone sealant to protect
your boat from water damage.
An existing antenna stem with standard 1" –
14 thread stem
Access for cable routing under the mounting
location
No access under the mounting location
Stem Mount with Existing
1” - 14 Thread Stem
Access Under Mounting Location
No Access Under Mounting Location
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