scope:

The present document specifies technical characteristics and methods of measurements for VHF radiotelephone with the following characteristics:

• operating in the channels and frequencies specified in the ITU Radio Regulations appendix 18 [1] as applicable, allocated to the maritime mobile service;

• using either 25 kHz or 25 kHz and 12,5 kHz channels and associated equipment for DSC - class D;

• capable of operating on single frequency and two-frequency channels with manual control (simplex);

• supporting dual frequency simplex operation only;

• using phase modulation, G3E (frequency modulation with pre-emphasis of 6 dB/octave) for speech, and G2B for DSC signalling.

Full duplex operation is not supported.

The present document does not provide technical requirements for conformance with the essential requirements of Directive 2014/53/EU [i.3] for any integrated GNSS receiver providing locating function.

NOTE 1: Additional VHF channels for maritime use outside those defined by appendix 18 to the ITU Radio Regulations [1] may also be provided where permitted by administration.

NOTE 2: The relationship between the present document and essential requirements of article 3.2 and article 3.3(g) of Directive 2014/53/EU [i.3] is given in annex A.