Able Body Seaman, Ordinary Seaman, Able Seafarer Deck

    With only a few exceptions a Merchant Mariner Credential
    (MMC) National rating endorsement as OS or AB is required to
    work on all ocean going commercial vessels of greater than 100
    gross tons.

  • Ordinary Seaman is an entry level rating that applies to both
    deck and engine departments. This rating that does not require
    any sea service experience or training courses.

    To qualify for an OS the applicant must demonstrate that they
    are physically fit for duty, pass a USCG/DOT Drug Screening,
    and complete the application form requesting the National
    Rating of OS. After gaining the required experience the mariner
    may advance from OS to Able Seaman (deck department) or
    Qualified Member of the Engine Department (QMED).

  • Able Body Seaman or Able Seaman is an MMC National deck
    rating that is the equal to journeyman. This MMC deck rating
    requires demonstration of knowledge of the Rules of the Road,
    navigation, seamanship, and safety; and a practical
    demonstration of marlinespike seamanship skills. To qualify as
    AB the applicant must also complete an approved Proficiency in
    Survival Craft Training course for the rating of either
    Lifeboatman or Lifeboatman Limited.

    The MMC National AB rating that the applicant is issued
    depends on their qualifying experience. Advancement from one
    AB rating to another is based on qualifying sea service
    experience alone, no additional exams or skill demonstrations
    are required. The professional requirements for the National AB
    ratings are published in Title 46 CFR Parts 12.401 through
    12.409:

  • AB Unlimited requires 1080 days of qualifying sea service
    experience on the deck of vessels operating on ocean waters.

  • AB Limited requires 540 days of qualifying sea service
    experience on the deck of vessels greater than 100 gross tons
    operating on ocean waters.

  • AB Special requires 360 days of qualifying sea service
    experience on vessels operating on the federally navigable
    inland waters of the US or on ocean waters.

  • AB Fishing requires 180 days of qualifying sea service
    experience on the deck of vessels operating on ocean waters or
    the federally navigable inland waters of the US.

  • AB OSV (Offshore Supply Vessel) requires 180 days of
    qualifying sea service experience on the deck of vessels
    operating on ocean waters or on the federally navigable inland
    waters of the US.

  • AB Sail requires 180 days of qualifying sea service experience
    on the deck of sailing vessels operating on ocean waters or on
    the federally navigable inland waters of the US.

Able Seafarer Deck (STCW Endorsement)

    The 2010 Manila Amendments to the STCW convention
    established an STCW endorsement equivalent to the MMC
    Rating of Able Seaman. This endorsement is called Able
    Seafarer Deck. US mariners holding a the rating endorsement
    AB should check to see if they also qualify for this new STCW
    endorsement.

Courses, Checklists, and Related Information










Columbia Pacific Maritime Inc.

Phone: (503) 841-6066

Email your license questions to
dennis@columbiapacificmaritime.com
__________________________

Professional Requirements

Research the endorsement you need
and the professional requirements for
that endorsements in the Professional
Requirements pages.

Most professional Merchant Mariner
Credential (MMC) endorsements
require qualifying sea service
experience. For information on how to
document your qualifying experience
goto the Application Help pages.

About Professional Licenses

Professional mariner licenses are
issued by the US Coast Guard in a
passport style book called a Merchant
Mariner Credential (MMC). A mariner's
professional qualifications are listed in
their MMC as endorsements. Their are
three types of endorsements:

National Officer Endorsements
authorize the mariner to be in charge
of the vessel, or a watch on the vessel.

National Rating Endorsements
authorize the mariner to assist the
officer as sailor, or deckhand, but not
be in charge of any watch.

STCW International Endorsements
apply to seagoing vessels greater than
200 GRT (500 GT); except for fishing
industry vessels which are excempt
from STCW regulations.
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Columbia Pacific Maritime LLC
Dennis A. Degner (c) 2016