1.1 Ships of the following general categories
are required to participate in the reporting system:
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.1 all ships of 300 gross tonnage and over;
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.2 all ships, regardless of gross tonnage, carrying
hazardous and/or potentially polluting cargo, as defined in paragraph
1.4 of the Guidelines and criteria for ship reporting systems (resolution
MSC.43(64));
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.3 ships engaged in towing or pushing another
vessel regardless of gross tonnage;
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.4 any category of vessel less than 300 gross
tonnage which is using the appropriate traffic lane or separation
zone in order to engage in fishing; and
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.5 any category of ships less than 300 gross tonnage
which is using the appropriate traffic separation zone in an emergency
in order to avoid immediate danger.