The present document defines classes of environmental conditions and their severities to which telecommunication
equipment may be exposed. The severities specified are those which will have a low probability of being
exceeded; generally less than 1 %.
The present document applies to equipment designed principally for maritime use. Conditions of use vary significantly
in relation to the size of the vessel and the function for which it was designed. The reader should ensure that the relevant
classes are chosen to suit this particular application.
The present document covers the following types of vessel:
vessel propelled by mechanical means, including offshore units;
vessel not propelled by mechanical means, including sailing boats and life rafts.
The classes defined apply to all sizes of vessel from pleasure craft to trawlers, ferry boats, icebreakers and cargo ships
including tankers.