6.1 It is desirable that the antenna be sited
in such a position that no obstacles likely significantly to degrade
the performance of the equipment appear in any azimuth down to an
angle of elevation of -5º.
6.2 The sitting of the antenna needs careful
consideration, taking into account the adverse effect of high levels
of vibration which might be introduced by the use of a tall mast and
the need to minimize shadow sectors. Objects, especially those within
10 m of the radome which cause a shadow sector of greater than 6º,
are likely significantly to degrade the performance of the equipment.
6.3 The above-deck equipment should be separated,
as far as is practicable, from the antennae of other communication
and navigation equipment.