General
ATC contingencies related
to communications, i.e. circumstances
preventing a controller from communicating with
aircraft under control, may be caused by either a failure of ground radio
equipment, a failure of airborne equipment, or by the control frequency being
inadvertently blocked by an aircraft transmitter. The duration of such events
may be for prolonged periods and appropriate action to ensure that the safety
of aircraft is not affected should therefore be taken immediately.
Ground Radio Failure
In the event of complete
failure of the ground radio equipment used for ATC, the controller shall:
a) where
aircraft are required to keep a listening watch on the emergency frequency
121.5 MHz, attempt to establish radio communications on that frequency;
b) without
delay inform SEAHORSE APPROACH CONTROL OFFICE, as applicable, of the failure;
c) if
practicable, request their assistance, in respect of aircraft which may
establish communications with SEAHORSE APPROACH CONTROL OFFICE, in establishing
separation between and maintaining control of such aircraft.
Read more Blocked Frequency Aircraft Transmitter Air Traffic Control
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