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

2.14.6 
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.

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’

Letter	Word	Say
A	ALFA	AL-fah
B	BRAVO	BRA-vo
C	CHARLIE	CHAR-lee
D	DELTA	DELL-ta
E	ECHO	ECK-oh
F	FOXTROT	FOKS-trot
G	GOLF	GOLF
H	HOTEL	ho-TELL
I	INDIA	IN-de-ah
J	JULIETT	JEW-lee-ETT
K	KILO	KEY-lo
L	LIMA	LEE-ma
M	MIKE	MIKE
N	NOVEMBER	no-VEM-ber
O	OSCAR	OSS-car
P	PAPA	pah-PAH
Q	QUEBEC	key-BECK
R	ROMEO	ROW-me-oh
S	SIERRA	see-AIR-ra
T	TANGO	TAN-go
U	UNIFORM	YOU-nee-form
V	VICTOR	VIK-ta
W	WHISKEY	WISS-key
X	X-RAY	ECKS-ray
Y	YANKEE	YANG-kee
Z	ZULU	ZOO-loo

2.8.4 
State the requirements for the carriage of an ELT

Requirements for the carriage of an ELT

Under rule 91.529, a person must not operate a NZ Certificate of Registration 
aircraft without an ELT(AF) unless it is:

1. When the aircraft is ferried to a place where the automatic ELT(AF) is to be installed provided NO PASSENGERS ARE CARRIED.
2. When the aircraft is to be ferried from a place where ELT repairs or replacement cannot be made to a place where they can be made provided NO PASSENGERS ARE CARRIED.
3. For a period of SEVEN (7) DAYS when the automatic ELT is inoperative, and a portable ELT is accessible to each person on board the aircraft

This rule does not apply to the following aircraft:

1. An aircraft with no more than one seat if the pilot is equipped with an Emergency 
Locator Transmitter (Survival) ELT(S) or Personal Locator Beacon (PLB).
2. A glider or micro-light aircraft if at least one person carried in it is equipped with 
an ELT(S) or PLB.
3. A glider or powered aircraft, including a micro-light aircraft, that is equipped with 
no more than two seats, if the glider or powered aircraft is operated not more than 10 
nm from the aerodrome from which the glider or powered aircraft took off.
4. A manned free balloon.

2.6.4 
Describe the function of the following terms, and explain the procedures to 
transmit: 
(a) Mode A information; and 
(b) Mode C information. 

Mode A information

Mode A information is transmitted through the transponder through the ‘ON’ function. 

When selected, mode A information (position only) is sent. 

Mode C information 

Mode C information is transmitted through the transponder through the ‘ALT’ function.

When selected, mode C information (position and altitude) is sent.