3.1 No control external to the equipment should
be available for alteration of the ship station identity.
3.2 It should be possible to initiate and make
distress calls by telephony or data communications from the position
at which the ship is normally navigated and from any other position
designated for distress alerting. In addition, where a room is provided
for radiocommunications, means to initiate distress calls should also
be fitted in that room.
3.3 Where no other means of receiving distress,
urgency and safety broadcasts or an addressed distress alert relay
are provided and existing levels of aural signals produced by the
telephone or printer are considered to be inadequate, the ship earth
station equipment should provide an aural/visual alarm of appropriate
level.
3.4 It should be possible to interrupt or initiate
distress calls at any time.
3.5 A distress call should be activated only
by means of a dedicated distress button. This button should not be
any key of an ITU-T digital input panel or an ISO keyboard provided
on the equipment.
3.6 The dedicated distress button should footnote:
3.7 The distress call initiation should require
at least two independent actions.
3.8 Paragraphs 3.5, 3.6 and 3.7 do not apply
to Inmarsat-A ship earth stations.