Which ships require an IAPP?

• A. Any ship 400+ gross tons that voyage to ports or offshore terminals under the jurisdiction of other parties
• B. Any ship 250+ gross tons
• C. Only ships with 15 passengers or more
• D. All ships regardless of size

Answer: (A)

IAPP requirements come from MARPOL Annex VI and refer to the International Air Pollution Prevention certificate. This certificate is needed for ships of 400 gross tons and above that operate on international voyages—meaning they call at ports or offshore terminals under the jurisdiction of other countries. The 400 GT threshold is the key limit, not the ship’s passenger count, and not every vessel must have it—only those on international voyages with non-domestic port calls.

So the correct idea is that ships 400+ gross tons that travel to foreign ports or offshore terminals require an IAPP. Smaller ships or those staying entirely within one country’s waters don’t fall under this requirement.