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16.7.4 The tank(s) should be of suitable design and construction, and have protection adequate for the service for which they are intended. Construction and fittings should be to an appropriate standard, to the satisfaction of the Recognised Organisation. Provision should be made to retain any oil leakage within the confines of the vessels


hull to protect the marine environment and any workers or crew on board partial MASS manned vessels, or any to be embarked at a later date. Tanks should be tested to class standards.


16.7.5 When considering proposals for the transport and transfer of MGO, UN1202 and other oils, in portable tanks or IBCs, the equivalency of MASS design should be satisfactorily addressed in the ‘practical’ context of MASS operations. This should take account of:


n Portable tanks or IBCs should meet the requirements of the IMDG Code for the carriage of MGO, UN1202, or oils classified as dangerous goods;


n It should be verified that the intended stowage location is designed for the carriage of cargo and that the loads / point loads are within design limits of the deck;


n Stability – assessment on the impact on vessels stability should be carried out and free surface effect consid- ered;


n “On board” filling of tanks - The filling and transfer arrangements including pipe work, transfer pumps, portable hoses, control of transfer, tank gauging and venting would need to be to the satisfaction of the vessel’s Recognised Organisation taking into consideration the following:


– Utilisation of Flexible Fuel hoses; – Filling arrangements; – MASS design to include hi-level and remote operator emergency cut-off capability, whilst remote spillage sensing/reporting should be included in the Certified design;


– A Save-all is to be provided around the portable tanks and connections


16.7.6 Satisfactory securing of a portable tank or IBC in its stowage position is to be provided taking into account the forces, directions and accelerations likely to be encountered.


16.7.7 Emergency response and contingency plans to be developed for spills, fire etc.


16.7.8 MASS remote sensing and monitoring should form part of the design risk based assessment of fuelling design and operations.


16.8 Transfer arrangements for receptacles containing less than 200 kg or 200 litres of dangerous goods


16.8.1 Receptacles should be secured within save-all (bunded) structures and any lifting to be carried out should use appropriate purpose-built cages/equipment.


16.9 Dangerous Goods Classes 16.9.1 The title of the dangerous goods classes is given below. For fuller descriptions, the IMDG Code should be consulted.


n Class 1 Explosives n Class 2 Gases n Class 2.1 Flammable gases n Class 2.2 Non-flammable, non-toxic gases


Maritime Autonomous Surface Ships up to and including 24 metres in length 77


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