Technical characteristics and methods of measurement for equipment for generation@ transmission and reception of Digital Selective Calling (DSC) in the maritime MF@ MF/HF and/or VHF mobile service; Part 2: Class A/B DSC (V1.4.0)
The present document states the minimum requirements for equipment to be used for generation@ transmission and reception of Class A or B Digital Selective Calling (DSC) for use on board ships. DSC is intended to be used in the Medium Frequency (MF)@ High Frequency (HF) and Very High Frequency (VHF) bands of the Maritime Mobile Service (MMS)@ for both distress@ safety and general communications. The present document is part 2 of a multi-part deliverable that covers the requirements to be fulfilled by equipment that is either integrated with a transmitter and/or a receiver or equipment that is a stand-alone DSC terminal and has the following class of DSC: ? Class A: includes all the facilities defined in annex 1 of Recommendation ITU-R M.493-14 [3] and complies with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF installations and/or VHF installations; ? Class B: provides minimum facilities for equipment on ships not required to use class A equipment and complies with the minimum IMO GMDSS carriage requirements for MF and/or VHF installations. This equipment should provide for: - alerting@ acknowledgement and relay facilities for distress purposes; - calling and acknowledgement for general communication purposes; and - calling in connection with semi-automatic/automatic services@ as defined in Recommendation ITU-R M.493-14 [3]@ annex 2@ clause 3. These requirements include the relevant provisions of the ITU Radio Regulations [2] and Recommendations ITU-R@ the International Convention for the Safety Of Life At Sea (SOLAS)@ and the relevant resolutions of the International Maritime Organization (IMO).