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Marine Corps · SSN history

654 Listener, Underwater

Appendix B marks the earlier SSN 654, Listener, Underwater, as having no Marine Corps specialty, establishing its deletion from Marine Corps use without a named successor. Radio Relay Technician is the June 1945 title for the same number, not an established replacement for the earlier occupation.

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Documented history

Listener, Underwater

June 1945 is the manual’s publication month; no calendar effective date is given for this deletion.

  • The matching asterisks link “None” specifically to Listener, Underwater in the September 1942 AR 615-26 and supplements column.
  • The Marine Corps designation does not establish that the Army occupation was abolished.
Source extraction notes

Predecessor title from the AR 615-26 column: Listener, Underwater. Suggested conversions/remarks, as printed: *None. Asterisks bind the suggestions to the correspondingly marked earlier title, not to an unmarked present-title meaning. The Present Title column is the manual's June 1945 meaning: Radio Relay Technician. It is not a present-day MOS equivalence. None means no Marine Corps specialty is identified for this earlier meaning; it does not establish that the Army occupation was abolished. 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.