Kongsberg Seatex AIS 100, Инструкция по эксплуатации

Страница: 50 / 113

Seatex AIS 100 Instruction Manual, rev. 5 Installation
42
5.6 AIS 100 VHF antenna
The range for receiving VHF signals relates directly to the height of
the antenna above sea level as well as the general on-board conditions
for reception and transmission of radio signals. For optimum AIS
radio performance the following should be taken into consideration:
VHF antenna installation
•
It is recommended that the AIS VHF antenna should be placed in a
position with a minimum of 2 metres in horizontal direction from
constructions made of conductive materials.
•
The antenna should not be installed close to any large vertical
obstruction and there should be a free view of the horizon through
360 degrees.
•
The antenna should be installed safely away from interfering high
power energy sources like radar and other transmitting radio
antennas, preferably at least 3 metres away from and out of the
transmitting beam and there should not be more than one antenna
on the same level.
•
The antenna should be mounted directly above or below the ships
primary VHF radiotelephone antenna, with no horizontal
separation and with a minimum of 2 metres vertical separation. If
located on the same level as other antennas, the distance apart
should be at least 10 metres.
Ship radio antenna
AIS VHF antenna
2.0
m
When installed straight above the
ship's radio antenna, the vertical
separation should be 2.0 m
10.0m
Mast
Vertical view
Horisontal view
Mast AIS VHF antenna Ship radio antenna
Figure 18 Recommended VHF antenna installation