9
GPS antenna location requirements
The NAVIOM AIS includes a built-in GPS receiver and a built-in GPS antenna. GPS antenna is
installed under the NAVIOM AIS lid indicated on the picture.
Ensure that the selected mounting location is:
• Open and clear all metal obstructions that could block line-of-sight to the sky. Can be placed only
behind plastic and wooden structures, that do not impede the transmission of the radio signal.
• As low as possible, to keep the antenna as stable as possible. The more stable the antenna, the
more effectively it will track satellites and provide stable data.
• As far as possible (at least 1 m (3 ft)) from other antennae and electronic equipment.
Do NOT mount the antenna:
• In any area where it could be stepped on or tripped over.
• Up a mast. This will cause the antenna to swing and give significant errors in position data.
• In the direct path of a Radar beam.
EMC installation guidelines
Naviom Electronics® equipment and accessories conform to the appropriate Electromagnetic
Compatibility (EMC) regulations, to minimize electromagnetic interference between equipment and
minimize the effect such interference could have on the performance of your system
Correct installation is required to ensure that EMC performance is not compromised.
For optimum
EMC performance we recommend that wherever possible:
• Naviom Electronics® equipment and cables connected to it are:
– At least 1 m (3 ft) from any equipment transmitting or cables carrying radio signals e.g. VHF radios,
cables and antennas. In the case of SSB radios, the distance should be increased to 2 m (7 ft).
– More than 2 m (7 ft) from the path of a Radar beam. A Radar beam can normally be assumed to
spread 20 degrees above and below the radiating element.
• The NAVIOM AIS is supplied from a separate battery from that used for engine start. This is
important to prevent erratic behavior and data loss which can occur if the engine start does not
have a separate battery.
Note:
In areas of extreme EMC interference, some slight interference may be noticed. Where this
occurs the NAVIOM AIS and the source of the interference should be separated by a greater
distance.
Important:
The device should be placed either vertically or horizontally with a lid NAVIOM up (as
shown on the picture). It is not allowed to mount the device with the lid NAVIOM down, in this
case the GPS antenna will not be able to receive the signal from the GPS satellites.
Summary of Contents for AIS
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