Marine Corps · SSN history

655 Listener, Sound Locator

Appendix B lists the earlier Army classification SSN 655, "Listener, Sound Locator," as deleted for Marine Corps use, marking it "None" to indicate no Marine Corps specialty. It names no replacement specialty or automatic conversion.

Documented history

Listener, Sound Locator

June 1945 is the manual’s publication date. No effective date is given for this classification change.

  • This does not establish that the Army occupation was abolished.
Source extraction notes

Predecessor title from the AR 615-26 column: Listener, Sound Locator. Suggested conversions/remarks, as printed: None. 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.