Marine Corps · SSN history

989 ASTP Chemical Engineering Trainee

SSN 989, listed as ASTP Chemical Engineering Trainee in AR 615-26 (September 1942 and supplements), was deleted for Marine Corps use. The instruction “Appropriate SSN” required review of the individual’s job and qualifications to select a replacement, rather than automatic conversion to a fixed specialty.

Documented history

ASTP Chemical Engineering Trainee

June 1945 is the manual’s publication date. The entry gives no effective date for the deletion or deadline for selecting a replacement.

  • No title is listed for SSN 989 in the June 1945 Present Title column.
Source extraction notes

Predecessor title from the AR 615-26 column: ASTP Chemical Engineering Trainee. Suggested conversions/remarks: Appropriate SSN. Source language is nondeterministic; no single successor is forced. The table gives no row-level effective date. June 1945 is the manual publication date, not an effective conversion date.

Source documents (1)

Reviewed September 24, 2026 against references 3 and 4.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.