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– choose mounting positions that are at least 300 mm (12 inches) below the water line.
• Transducers should be installed in a location where there is sufficient clearance inside the hull to
fit the nut and have at least 100 mm (4 in) of headroom to allow for withdrawal.
• To avoid interference with the internal magnetometer, mount transducers at least 1 m (39 inches)
from other electrical devices.
EMC installation guidelines
Raymarine 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.
Note: In areas of extreme EMC interference, some slight interference may be noticed on the
product. Where this occurs the product and the source of the interference should be separated
by a greater distance.
For optimum EMC performance we recommend that wherever possible:
• Raymarine equipment and cables connected to it are:
– At least 1 m (3.3 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 (6.6 ft).
– More than 2 m (6.6 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 product 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.
• Raymarine specified cables are used.
• Cables are not cut or extended, unless doing so is detailed in the installation manual.
Note:
Where constraints on the installation prevent any of the above recommendations, always ensure
the maximum possible separation between different items of electrical equipment, to provide the
best conditions for EMC performance throughout the installation.
Transducer dimensions — RV-4xx
All transducers in the RV-4xx series have the same external dimensions.
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Troubleshooting
