Tag Archives: entry level

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

Posted in Frequently Asked Questions, How to ..... | Tagged , , , , | Leave a comment