GPS-20A Chapter
4
Installation Manual
Installation
Chapter 4 Installation
4.1 Installation precautions
The installation of the GPS receiver module should only be carried out by qualified technicians.
Installing the GPS receiver module comprises the following actions.
(1) Unpacking and inspecting the components.
(2) Checking the power supply voltage and current capacity is rated for the GPS receiver module.
(3) Determining the installation site.
(4) Cable
laying.
(5) Installing the GPS receiver module.
4.2 Unpacking and inspection of the goods
Unpack the contents and check each component against the component delivery list. If the contents
differ from that which is on the list, or there are damaged components, contact the shipping agent or
the nearest KODEN dealer.
4.3 Installation site
Be sure to install the GPS sensor in the highest possible location on the ship for optimum reception of
the satellite signal.
Any obstructions in the vicinity of the antenna could result in the loss of the satellite signal reception,
positioning time degradation or a reduction in the position accuracy.
(1) Keep at least 0.5m away from metallic objects.
(2) Keep at least 4m away from MF/HF L type transmission antennas and VHF or HF whip antennas.
(3) Keep at least 1.5m away vertically, from MF/HF L type transmission antennas.
(4) Keep at least 1m away from receive antennas.
(5) Install away from the ship’s radar beam (straight beam angle: 30 – 40 degrees).
(6) Keep at least 1m away from the ship’s Radar antenna.
(7) Keep at least 5m away from the INMARSAT antenna.
(8) Keep at least 3m away from loop antennas.
(9) Keep at least 2m away from the ship’s engine.
(10) Display devices such as cathode ray tubes and LCDs can sometimes interfere with the reception
of beacon signals. Keep at least 1m away from display devices such as Plotters, Radars and
Sounders.
Refer to Table 1 for the recommended safe installation distances from masts and struts of the ship’s
super-structure.
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