Relevant Military Sea Service Chart

Relevant Military Sea Service Chart


Employment applicants for civil service mariner jobs with Military Sealift Command must have a U.S. Coast Guard issued merchant mariner’s credential. Click here to download both the MMC application and general information packages.

Contact a recruiter for more information.

Military time/sea service can be used to qualify for advanced merchant mariner’s ratings. Use this chart to assess the merchant mariner’s equivalent to your military service:

sea-service
Navy & Coast Guard Rating and Their Equivalencies Deck100% Deck50% QMED100% QMED* Purser100% Purser† Purser
50%
Jr.
Asst.
Purser
Boatswain’s Mate (BM) x
Boiler Technician (BT) x
Damage Controlman (DC) x
Data Processing Technician (DP) x
Disbursing Clerk (DK) x
Electrician’s Mate (EM) – Coast Guard x
Electrician’s Mate (EM) – Navy x
Engineman (EN) x
Gas Turbine Systems Technician (GS) (GSE) (GSM) x
Gunner’s Mate (GM) x
Health Services Technician (HS) x
Hospital Corpsman (HM) x
Hull Maintenance Technician (HT) x
Machinery Technician (MK) x
Machinery Repairman (MR) x
Machinist’s Mate (MM) x
Mess Management Specialist (MS) x
Operations Specialist (OS) x
Quartermaster (OM) x
Radarman (RD) x
Ship’s Serviceman (SH) x
Signalman (SM) x
Storekeeper (SK) x
Subsistence Specialist (SS) x
Telephone Technician (TT) x
1st Rule: Calculate 60% of qualifying time, then apply additional percentage as shown above.
*QMED 100% ONLY for standing engineroom watches; watchstanding must be documented. †Purser 100% must be a PO1 through MCPO, or PO2 for 5 years in supervising and ordering.