Ships of 300 gross tonnage and over are required to participate
in the system. This threshold is the same as used in the existing
voluntary MAREP scheme (SN/Circ. 167, annex, page 4).
Within the coverage area, these arrangements replace the
existing MAREP scheme for ships of 300 gross tonnage and over. However,
ships of less than 300 gross tonnage should continue to make reports
under the existing voluntary arrangements in circumstances where they:
- are "not under command" or at anchor in the TSS or its ITZs;
- are "restricted in their ability to manoeuvre"; or,
- have defective navigational aids.
The MAREP arrangements outside the coverage area of this system
remain unchanged.