Instruction manual

PROFICIENCY IN SURVIVAL CRAFT AND RESCUE BOATS OTHER THAN
FAST RESCUE BOATS
14 1
14. Radio Equipment
14.1 Two-way VHF radiotelephone apparatus
14.1.1 Recommendation on performance standards for on-scene
(aeronautical) portable two-way VHF radiotelephone apparatus
( Annex 5 Resolution MSC 80 (70) Dec 1998)
General
The equipment should be portable and capable of being used for
on-scene communication between a ship and aircraft.
The equipment should comprise at least:
- an integral transmitter/receiver including antenna and battery;
- an integral control unit including a press-to-transmit switch; and
- a microphone and loudspeaker
The equipment should:
- be capable of being operated by unskilled personnel;
- withstand drops on to a hard surface from a height of 1 m;
- be of small size and light weight;
- be capable of operating in the ambient noise level likely to be
encountered during SAR operations;
- have provisions for the use of external microphone/headset; and
- have a colour which distinguishes it from the portable equipment
specified in resolution A.809(19).
Class of emission, frequency bands and channels
The two way radiotelephone should be amplitude-modulated and
capable of operation on the frequencies 121.5 MHz and 123.1 MHz.
Control and Indicators
An on/off switch should be provided with a positive visual indication that
the radiotelephone is switched on.
The receiver should be provided with a manual volume control by which
the audio output may be varied.
Frequency selection should be easily performed and the frequencies
should be clearly discernible.
Permissible warming-up period
The equipment should be operational within 5 s of switching on.
Safety precautions
The equipment should not be damaged by the effects of open-circuiting
or short-circuiting the antenna.
Transmitter power
The carrier power should be between 50 mW and 1.5 W.