This requirement can be met by:
- a standard VHF radiotelephone; or
- a facility consisting of a loudspeaker and a microphone with channel
selector; or
- a facility consisting of a loudspeaker and a microphone (in this
case the channel selector will be convenient to the conning position);
or
- a portable VHF equipment with channel selector (it may be the
equipment required by reg III/6.2.1).