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n If fitted with an MF installation, on DSC 2187.5 kHz; n If fitted with a satellite installation, with enhanced group calling; n For broadcasts of Maritime Safety Information e.g. by NAVTEX.


8.3.6 The controller of the MASS should hold a certificate of competence for distress and safety radiocommunications (e.g. GMDSS Short Range Certificate or Long Range Certificate as appropriate).


Area Category


Table 8.1: Communication Equipment requirements for MASS 6


3,4,5 (up to 3 nm) VHF radio installation with DSC


MF radio installation with DSC or a satellite installation


NAVTEX receiver EPIRB Search and Rescue locating device Hand-held waterproof VHF radio M = Minimum R = Recommended M R M R R (up to 20 nm) M M


2 (up to 60 nm) M M R R R M


1 (up to 150 nm) M M R M M M


8.4 Communications for Control System Monitoring and Input


8.4.1 RF Communications systems that are required to exercise the required Level of Control (as outlined in Chapter 2), or are necessary to enable the Emergency Stop functionality, should be provided with reversionary modes and backup energy supplies, the scope of which will depend on both the MASS Category (see Chapter 3) and the Area of Operation.


8.4.2 These reversionary modes and energy supplies should be considered in the Risk Assessment, such that the risk of loss of control communications and ability to execute the emergency stop function is reduced to a level As Low As Reasonably Practical (ALARP).


8.4.3 The communication suite is assumed to reflect the holistic coding requirements or registration certification of the vessel. Any reduction in system fit should be formally recorded, with each new mission/task requirement being reviewed and documented as ‘fit for task’ prior to operation.


8.4.4 If alternative communication systems are adopted as the primary method, the appropriate minimum level of RF communication capability should be fitted relative to the specific operation cycle.


8.4.5 In the case of a wider system failure, an adequate failsafe communication system to support COLREG compliance should be fitted. This system should have suitable range and endurance capabilities as to enable the operator to effect appropriate safe management of the uncontrolled vessel.


Maritime Autonomous Surface Ships up to and including 24 metres in length 39


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