5 Antenna Siting
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Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.306(87) – Revised Performance Standards for Enhanced Group Call (EGC) Equipment – (Adopted on 17 May 2010) - Annex – Revised Performance Standards for Enhanced Group Call (EGC) Equipment - 5 Antenna Siting

5 Antenna Siting

  5.1 Where an omni-directional antenna is used, it is desirable that the antenna be sited in such a position that no obstacle likely to degrade significantly the performance of the equipment appears in the fore and aft directions down to -5° and in the port and starboard directions down to -15°.

  5.2 Where a stabilized directive antenna is used, it is desirable that the antenna be sited in such a position that no obstacle likely to degrade significantly the performance of the equipment appears in any azimuth down to -5°.

  5.3 For omni-directional antennas, objects, especially those within 1 m of the antenna, which cause a shadow sector of greater than 2°, are likely to degrade significantly the performance of the equipment.

  5.4 For directive antennas, objects, especially those within 10 m of the antenna, which cause a shadow sector of greater than 6°, are likely to degrade significantly the performance of the equipment.

Parent topic: Annex – Revised Performance Standards for Enhanced Group Call (EGC) Equipment
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