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iFleetONE™ Terminal Installation Manual
1.5.4 Obstruction
When locating the antenna, it is very important to ensure that there is a clear line-of-sight to
the satellite for all the satellite elevation angles in the region in which the vessel will operate.
The antenna moves in azimuth 360⁰ and in roll and pitch down to -15⁰ to ensure constant
tracking even in heavy seas. Any obstructions within this arc can cause performance
degradation of the signal quality. The amount of degradation depends on the size of the
obstruction and distance from the antenna. The table below is a guide on the object size, at a
given distance from the antenna that gives limited degradation.
Object Distance
3 m
6 m
10 m
15 m
Object Size
16 cm
32 cm
52 cm
79 cm
Page 20 of 41
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