2.14.8
Describe the procedure involved in terminating emergency communications.
Terminating a Distress Communication
When the Pilot in Command of the distressed aircraft considers the emergency to be no longer present a message must be transmitted to the station controlling the distress traffic – cancelling the distress
The controlling station will then transmit a message including the words “DISTRESS TRAFFIC ENDED“
The transponder code 7700 should be changed to a code as advised by ATC or as required
The ELT switch should be returned to ARM
2.8.6
Explain how an ELT can be activated:
(a) automatically in the event of an impact; and
(b) manually.
How an ELT can be activated
The ELT(AF) can be activated by either:
(a) Automatically in the event of an impact (inertia), the ELT(AF) contains an inertia switch, this activates during rapid deceleration (could be activated by a heavy landing).
(b) Manually by switching to the ON position
2.6.6
State the emergency codes and explain when they should be used.
Emergency codes
Emergency situations can be indicated to ATC by dialling your transponder to a certain code.
| Code |
|
| 7700 |
To indicate a state of emergency
other than the following. |
| 7600 |
To indicate communication failure. |
| 7500 |
To indicate unlawful interference (Hijack etc) |
[vfr_FlashCards p1=”2.2″]
2.16.6
Describe corrective actions that could be taken, including:
(a) Change of frequency or station;
(b) Transmitting blind;
(c) Increase in altitude.
If none of these are successful:
* Change station frequency
* If using headphones and boom mike revert to cockpit speaker and hand held microphone instead of boom mike or vice versa
* Change frequency to another station within VHF range
* Make calls to other aircraft if successful ask one of them to relay for you
* Transmit BLIND – pre-fix the radical with “transmitting blind”
* Fly higher if possible as loss of communication could be due to high terrain
2.14.6
Describe the actions by stations not involved in the emergency with regard to:
(a) Radio silence; and
(b) Provision of assistance.
Radio silence
The Pilot in command of the aircraft in distress is permitted to impose radio silence on any other station(s) which interfere with the distress traffic.
The appropriate transmission to the station(s) will be:
– Stop transmitting
– Mayday
Stations not involved with the distress traffic may commence transmissions again when:
– The distress is cancelled or the distress traffic is terminated
– All distress traffic has been transferred to other frequencies
– The station controlling communications gives permission
– It has, itself, to render assistance.
Provision of assistance
If an aircraft has made several mayday calls with no response you may be able to assist by relaying the distress call to a ground station.
The relaying aircraft must be careful in their transmission to advise that they are relaying and not, themselves, in a distress situation.
Terminating emergency communications
When the Pilot-in-command of the distress aircraft considers the emergency is no longer present, a message must be transmitted to the station controlling the distress traffic, cancelling the distress.
The controlling station will then transmit a message including the words ‘distress traffic ended’
