Marine Corps · MOS history

1800 Basic Tank and Aslt Amphib Crewman

Marine Corps MOS 1800 was renamed from "Basic Tank and Aslt Amphib Crewman" to "Basic Tank and Aslt Amphib Marine." The MOS number remained 1800; this was a title change, not a conversion to a different specialty.

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1800 Basic Tank and Aslt Amphib Crewman

Documented history

Basic Tank and Aslt Amphib Crewman

The recorded end date for the old title is June 24, 2016. June 30, 2016 is the publication date of MARADMIN 342/16, not the effective date of the change.

Source extraction notes

Same-code title change to: Basic Tank and Aslt Amphib Marine.

Source documents (1)

Reviewed September 24, 2026 against references 1 and 2.

MARADMIN 342/16, Military Occupational Specialty Renaming
1. MARADMIN 342/16, para 4 old/new description tables · source dated June 30, 2016 · cited by the explanation
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2.MARADMIN 342/16, Military Occupational Specialty Renaming · event transcription · docs/legacy-data/usmc-mos-conversions.jsonl:203; MARADMIN 342/16, para 4 old/new description tables · cited by the explanation
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Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.