Location Of Antenna Unit - Raytheon STD 21 GPS Operation Manual

3.2.2

Location of Antenna Unit

(See Figure 28, Figure 29, Figure 30 and Figure 31)
-- Select a location where vibration and shock are minimal.
-- Separate the Antenna Unit from the mast, depending on the diameter of the mast
Mast diameter 100mm with a distance of at least 1.5m (see Figure 28)
Mast diameter 300mm with a distance of at least 3.0m(see Figure 28)
-- Locate the Antenna Unit at least 3.0 meters away from Inmarsat--B antenna and
Radar antenna. Do not install the Antenna Unit within the transmit beam of the
Inmarsat--B antenna (see Figure 30).
-- Locate the Antenna Unit above the Radar antenna, out of the Radar beam
(see Figure 29).
-- Mount the Antenna Unit clear of interfering objects which may obstruct reception
(see Figure 29).
-- The mounting angles referring to ship's centerline and ship's baseline must not be
more than 6° (see Figure 31).
-- Do not install the Antenna Unit directly over funnel emissions.
Figure 28:
Edition: Feb. 05, 2007
Satellite Compass
STD 21 GPS
ship's ahead
Distance Mast -- Antenna Unit
Mast diameter
ship's aft
Mast diameter
100mm
300mm
Distance Mast -- Antenna Unit (manufacturers recommendation)
The Antenna Unit should not be installed on a mast
made of wood or plastic material, otherwise a separate
common ground connection must be made from the
Antenna Unit to the common ground.
Distance Mast--Antenna Unit
min 1.5m
min 3.0m
33
STD 21 GPS
3717/110--850.DOC020002