General Location Requirements - Raymarine RAY50 Installation And Operation Instructions Manual

3.9 General location requirements

When selecting a location for the unit it is important
to consider a number of factors.
Antenna mounting and EME exposure
Ensure that the antenna is connected to the radio
before transmission.
Raymarine declares a Maximum Permissible
Exposure (MPE) radius of 1.5 metres (4.9 ft) (per
OET Bulletin 65) for this system, assuming 25 watts
output to an omnidirectional antenna of 3dBi gain
or less.
For watercraft with suitable structures, the antenna
base must be at least 3.5 metres (11.5 ft) above
the main deck to meet the MPE for persons up to
2 metres (6.6 ft) tall. For watercraft without such
structures, the antenna must be mounted so that its
base is a minimum of 1.5 metres (4.9 ft) vertically
from heads of all persons.
The antenna must be isolated from the vessel's
metalwork using an insulated (e.g. plastic) mounting
bracket.
Compass safe distance
To prevent potential interference with the vessel's
magnetic compasses, ensure an adequate distance
is maintained from the product.
When choosing a suitable location for the product
you should aim to maintain the maximum possible
distance from any compasses. Typically this distance
should be at least 1 m (3 ft) in all directions. However
for some smaller vessels it may not be possible to
locate the product this far away from a compass. In
this situation, when choosing the installation location
for your product, ensure that the compass is not
affected by the product when it is in a powered state.
GPS location requirements
In addition to general guidelines concerning the
location of marine electronics, there are a number
of environmental factors to consider when installing
equipment with an internal GPS antenna.
Mounting location
• Above Decks mounting:
Provides optimal GPS performance. (For
equipment with appropriate waterproof rating.)
• Below Decks mounting:
GPS performance may be less effective and may
require an external GPS antenna mounted above
decks.
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1. This location provides optimal GPS
performance (above decks).
2. In this location, GPS performance may be less
effective.
3. This location is NOT recommended for GPS
antenna.
Vessel construction
The construction of your vessel can have an impact
on GPS performance. For example, the proximity
of heavy structure such as a structural bulkhead,
or the interior of larger vessels may result in a
reduced GPS signal. Before locating equipment
with an internal GPS antenna below decks, seek
professional assistance and consider use of an
external GPS antenna mounted above decks.
Prevailing conditions
The weather and location of the vessel can affect the
GPS performance. Typically calm clear conditions
provide for a more accurate GPS fix. Vessels at
extreme northerly or southerly latitudes may also
receive a weaker GPS signal. GPS antenna mounted
below decks will be more susceptible to performance
issues related to the prevailing conditions.
Ventilation requirements
To provide adequate airflow:
• Ensure that equipment is mounted in a
compartment of suitable size.
• Ensure that ventilation holes are not obstructed.
• Ensure adequate separation of equipment.
Mounting surface requirements
Ensure units are adequately supported on a secure
surface. Do NOT mount units or cut holes in places
which may damage the structure of the vessel.
Cable routing requirements
Ensure the unit is mounted in a location which allows
proper routing and connection of cables:
• Minimum cable bend radius of 100 mm (3.94 in) is
required unless otherwise stated.
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D11537-2
Ray50 / Ray60 / Ray70