Tag Archives: rating

Able Seaman (AB) Endorsement; Who Needs One?

With a few exceptions federal regulations require sailors working on deck of seagoing vessels greater than 100 gross registered tons (GRT) to be credentialed. meaning they must hold a Merchant Mariner Credential (MMC) endorsement as either Able Seaman (AB) or Ordinary … Continue reading

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Ordinary Seaman (OS) Rating

Ordinary Seaman (OS) is an entry level National Rating Endorsement on the MMC (Merchant Mariner Credential). This is the equivalent of an apprenticeship position, and is the minimum rating required to serve as a deckhand on sea going merchant vessels … Continue reading

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