Marine Corps · SSN history

690 Antiaircraft Fire Control Observer, Flank Station

Appendix B identifies SSN 690 as Antiaircraft Fire Control Observer, Flank Station in the AR 615-26 column for September 1942 and supplements. It suggests reclassification to SSN 594 or 596, subject to individual Qualification Card and job-specification review, not automatic conversion to either code.

Codes named in this history

Codes without a directory match

  • 594 stated by the source. No directory or archive record matches.
  • 596 stated by the source. No directory or archive record matches.

Documented history

Antiaircraft Fire Control Observer, Flank Station

June 1945 is the manual's publication date; the entry gives no calendar date for reclassification.

  • The June 1945 Present Title column is blank, and the suggested alternatives do not establish a fixed successor or an automatic split.
Source extraction notes

Predecessor title from the AR 615-26 column: Antiaircraft Fire Control Observer, Flank Station. Suggested conversions/remarks, as printed: 594, 596. These are suggested reclassifications subject to individual Qualification Card and job-specification review, not automatic or present-day equivalents. The table gives no row-level calendar effective date. June 1945 is the manual publication date, not an inferred individual 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.