Key to Endorsements on Deck Ratings

Occasionally mariners and employers have difficulty deciphering the Merchant Mariner’s Credential.  Many of the endorsements are indicated by letter and Roman numeral, without supportive definition.

The US Merchant Marine Credential has two parts. One describes the authority of the holder based on US licensing regulations. This is the “National” credential. The second part, omitted on credentials for mariners who do not need it, is the STCW authority. Here is a key to translating the STCW endorsement with links to the appropriate Checklists.

Symbol Certificate
II/4 Ratings Forming Part of a Navigational Watch
II/5 Able Seafarer Deck
IV/2 GMDSS Radio Operator
IV/2 GMDSS At-Sea Maintainer
V/1-1-1 Basic Oil and Chemical Tanker Operations
V/1-1-2 Advanced Oil Tanker Cargo Operations
V/1-1-3 Advanced Chemical Tanker Cargo Operations
V/1-2-1 Basic Liquefied Gas Tanker Operations
V/1-2-2 Advanced Liquefied Gas Tanker Cargo Operations
VI/1 Basic Training (formerly Basic Safety Training)
VI/2 Proficiency: Survival Craft & Rescue Boats (except Fast Rescue Boats).
Proficiency: other than fast rescue boats.
Proficiency: Survival Craft (Limited)
Proficiency: Fast Rescue Boats
VI/3 Advanced Firefighting
VI/4 Medical First Aid Provider & Medical Person-in-Charge
VI/5 Vessel Security Officer
VI/6 Vessel Personnel with Designated Security Duties