|Able Seaman (AB) Page
Able Seaman (AB) and Ordinary Seaman (OS) Information
With only a few exceptions an Ordinary Seaman or an Able Seaman
rating is required to work on all ocean going commercial vessels of
greater than 100 gross tons.
Ordinary Seaman (OS) is an entry level rating that requires NO
qualifying experience, exams or training. Advancement from OS can
be to either the deck department as AB (Able Seaman) or to the
engine room as QMED (Qualified Member of the Engine Department).
Able Seaman (AB) (46 CFR 12.05-7) is a deck rating that requires
qualifying sea service experience and training. The AB rating that
you receive will be based on your qualifying sea service experience.
All AB ratings require the mariner to complete an approved
Lifeboatman (Proficiency in Survival Craft) Course and one or more
elements of an approved Basic Safety Training (BST) course.