Marine Corps · SSN history

957 Airplane Electrical Instrument Specialist (DO)

Appendix B lists SSN 957, Airplane Electrical Instrument Specialist (DO), under AR 615-26 (September 1942 and supplements), with SSNs 685 and 686 as suggested alternatives. These were not automatic conversions: each person's Qualification Card had to be reviewed against the job requirements before selecting a replacement.

Codes named in this history

Codes without a directory match

  • 685 stated by the source. No directory or archive record matches.
  • 686 stated by the source. No directory or archive record matches.

Documented history

Airplane Electrical Instrument Specialist (DO)

June 1945 is the manual's publication date, not an established conversion or end date for SSN 957. No effective date is given for this entry.

  • The June 1945 Present Title column is blank for SSN 957; the entry does not establish a fixed successor or an automatic split into both suggested specialties.
Source extraction notes

Predecessor title from the AR 615-26 column: Airplane Electrical Instrument Specialist (DO). Suggested conversions/remarks: 685, 686. 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.