Military to Mariner: Sea Time & GI Bill

By Captain Mike · 50 years at sea · Maine Maritime Academy graduate · former MITAGS faculty
September 2026

Already served in the Navy or Coast Guard?

Don't assume you're starting from zero. Your military sea service, watchstanding qualifications, and training may satisfy part of the sea-service requirement for a Merchant Mariner Credential. Before taking unnecessary courses or piling up more sea time, have your record evaluated against the credential you want.

Military sea service can count

The Coast Guard evaluates military sea service for its equivalence to service on merchant vessels, and decides what grade, class, and limit of endorsement you're eligible for. 46 CFR 10.232

60%Normally, 60 percent of total time onboard is considered equivalent underway service.

Your dutiesTonnage, routes, propulsion power, time underway, and assigned duties are all considered.

CO / EOMaster or Chief Engineer Unlimited requires service as commanding officer or engineer officer.

Watchstanding qualifications — such as Deck Watch Officer, Officer of the Deck, or Engineering Officer of the Watch — and the positions you held are part of what the National Maritime Center reviews. The NMC makes the final determination for the specific credential you request.

How is military time credited? The 60% rule, what your rate or rank may count as, small boats, recency, and the exact records to request for each service. Military Sea Service →

What to gather

Official transcript of sea service or history of assignments — required with your application. 46 CFR 10.232
Vessel details: tonnage or displacement, propulsion power, and routes
Your watchstanding qualification letters and qualification records
Training records and course completion certificates
The NMC checklist for the endorsement you want — so you know exactly what gap remains

Your GI Bill may help pay for the transition

GI Bill benefits may help pay for maritime education, approved training programs, apprenticeships, licensing and certification tests, and certain exam-preparation courses. Eligibility depends on you, your benefit program, the school or course, and VA approval.

Licensing and certification tests: VA can reimburse approved test fees, up to $2,000 per test, charged against your entitlement. VA
Prep courses: VA covers prep courses only for tests it has approved, and only under the Post-9/11 GI Bill (Chapter 33) or Chapter 35.
Schools and programs: Check any maritime academy, training school, or course in the GI Bill Comparison Tool before you enroll. Don't assume a course is approved.

Military Sealift Command: a civilian route that suits many veterans

Military Sealift Command (MSC) crews U.S. government support ships mainly with Civil Service Mariners (CIVMARs), federal civilian employees who hold Coast Guard credentials like any other merchant mariner. For a veteran, it can be a familiar setting: Navy-supporting missions, but as a civilian.

MSC advertises a Military-to-MSC program for former service members with relevant sea experience. According to MSC, it offers paid trainee positions as Third Officer, Third Assistant Engineer, Able Seaman, and Deck Engineer Machinist, covers the required training, and provides a support team through the Coast Guard credentialing process.

Read the fine print. MSC lists entry requirements that include U.S. citizenship, a valid passport, a TWIC (or DoD Common Access Card), a Merchant Mariner Credential (MMC), a Coast Guard medical certificate, and military service records. So you will usually still need your first MMC before you apply. Program details change; confirm current requirements directly with MSC.

Visit Military Sealift Command careers →

Sources: MSC careers site · MSC: Civil Service Mariners. Mariners Online is not affiliated with Military Sealift Command.

Other ways to sail on government-supporting ships: NOAA, commercial ship managers and U.S.-flag carriers also hire. See the Military & Government Sealift directory →

Traps that cost veterans time and money

Taking courses you may not need before your sea service has been evaluated.
Leaving the service without a copy of your sea service transcript and qualification records. Get them before you separate.
Assuming every maritime course is GI Bill-approved. Verify first.

Next step

Start your credential, then map your remaining gap.

TWIC & First MMC AB to Third Mate Wiper to QMED

Sources

Before you file: Confirm every requirement with the NMC and VA. Rules and approvals change.