1.7.1 On VHF channels allocated to port operations
service, the only messages permitted are restricted to those relating
to the operational handling, the movement and the safety of ships
and, in emergency, to the safety of persons; as the use of these channels
for ship-to-ship communications may cause serious interference to
communications related to the movement an safety of shipping in port
areas.
1.7.2 Instructions given on communication matters
by shore stations should be obeyed.
1.7.3 Communications should be carried out on
the channel indicated by the coast station. When a change of channel
is requested, this should be acknowledged by the ship.
1.7.4 On receiving instructions from a coast station
to stop transmitting, no further communication should be made until
otherwise notified (the coast station may be receiving distress or
safety messages and any other transmissions could cause interference).