SMARTCRAFT/NMEA 2000 GPS
Page 2 / 6 © 2020 Mercury Marine 90-8M0172030 eng JULY 2020
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Elevation (above vs below deck)—Although the GPS sensor antenna can be mounted above or below the deck,
mounting above the deck will yield optimal performance.
Location Location description
1
Mounted above decks with clear unobstructed view of the sky in all directions. This location provides optimal
GPS sensor performance.
2
Mounted below decks with only fiberglass between the sky and GPS sensor. A reduction in sensor
performance will occur when mounted below decks.
3 This location is not recommended for the GPS sensor installation.
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All Location Requirements—Mount the GPS sensor in an area close to the vessel's center of gravity to reduce pitch
and roll effects on position reporting. Install the GPS sensor a safe distance away from all hazards that could result in
physical damages, excessive vibration, or excessive heat.
•
Electromagnetic Interference (EMI)— Poor performance and loss of satellite signals will result from mounting the GPS
sensor too close to strong sources of EMI. Observe the following installation requirements regarding EMI:
• Mount the GPS sensor a minimum of 0.91 m (3 ft) from any engine(s).
• Mount the GPS sensor a minimum of 0.91 m (3 ft) from any radio or radar antennas.
• Do not mount the GPS sensor in the direct path of any radar antennas.
•
Vessel construction—Do not mount the GPS sensor in locations where immediate surroundings of the boat structure
contain large metallic or reflective material surfaces.
•
Prevailing conditions—Calm and clear weather conditions provide optimal conditions for GPS sensor accuracy.
Locations at extreme North or South latitudes may reduce the GPS satellite signal strength. GPS sensors that are
mounted below decks will be more susceptible to performance issues when operating in sub‑optimal conditions or
locations.
GPS Sensor and Connector Clearance Dimensions
a - 60.7 mm (2.39 in.)
b - 18.5 mm (0.73 in.)
c - 76.2 mm (3 in.) connector clearance
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