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 1: Common requirements (V1.4.2)
The present document states the minimum requirements for equipment to be used for generation@ transmission and reception of 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 distress@ urgency and safety communication and general communications. The present document is a multipart deliverable that covers the requirements to be fulfilled by: - DSC equipment integrated with a transmitter and/or a receiver; - DSC equipment not integrated with a transmitter and/or a receiver. These requirements include the relevant provisions of the ITU Radio Regulations [i.17] and Recommendations ITU-R M.493-14 [2]@ M.541-10 [3]@ M.689-3 [4] and M.1082-1 [5]@ the International Convention for the Safety Of Life At Sea (SOLAS) [i.16]@ and the relevant resolutions of the International Maritime Organization (IMO). Equipment for generation@ transmission and reception of DSC designed according to the following equipment classes: ? Class A: includes all the facilities defined in annex 1 of Recommendation ITU-R M.493-14 [2] 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 [2]@ annex 2@ clause 3. ? Class D: provides minimum facilities for VHF DSC distress@ urgency and safety as well as routine calling and reception as recommended by IMO MSC/Circ.803 [i.2] for non-SOLAS vessels participating in the GMDSS. ? Class E: provides minimum facilities for MF and/or HF DSC distress@ urgency and safety as well as routine calling and reception as recommended by IMO MSC/Circ.803 [i.2] for non-SOLAS vessels participating in the GMDSS. ? Class H: provides minimum facilities for handheld VHF DSC distress@ urgency and safety as well as routine calling and reception as recommended by IMO MSC/Circ.803 [i.2] for non-SOLAS vessels participating in the GMDSS. ? Class M: provides minimum facilities for VHF Man Overboard devices as defined in Recommendation ITU-R M.493-14 [2]. NOTE 1: Class A and Class B equipment may support the optional semi-automatic/automatic service in accordance with Recommendations ITU-R M.689-3 [4]@ M.1082-1 [5] and M.493-14 [2]@ tables 4.10.1 and 4.10.2 and are encouraged to do so. NOTE 2: Class D and Class E equipment may also support the optional semi-automatic/automatic service.