scope:

This part of the standard classifies groups of environmental parameters and their severities to which a product is subjected when installed aboard a ship.  Ships where products may be permanently or temporarily installed include:

 -- ships propelled by mechanical means, including mobile offshore units;

 -- ships not propelled by mechanical means, including sailing boats and life rafts.

The classes defined apply to all sizes of ships from pleasure craft to trawlers, ferry boats, ice breakers, cargo ships including tankers.

The areas in which ships normally navigate are:

 -- inland waterways (canals, rivers lakes);

 -- coastal waters;

 -- oceans.

Areas where ships have to navigate in ice are also included.

The environmental condition classification given in this standard applies to products which are installed for the running, handling and safety of the ship.  It may also be used for other products installed in a similar way and in the same locations.

Accidental incidents are not included, but the possibility of their occurrence may need to be taken into account for products vital to the safety of the ship.

The classification does not cover the effect of water pressure on submerged products.

For the use of the classified environmental parameters and their severities in ships propelled by mechanical means, see the environmental conditions specification in IEC Publication 92-101.

Classifications of storage and transportation environmental conditions are given in other parts of IEC Publication 721-3.