Marine Corps · SSN history

725 Heavy Artillery Plotter

The June 1945 manual identifies SSN 725, Heavy Artillery Plotter in the June 1944 tentative manual, as having no Marine Corps specialty (“None”), supporting its deletion for Marine Corps use. The note “see also 645” is a cross-reference, not an automatic conversion or a fixed successor.

Documented history

Heavy Artillery Plotter

June 1945 is the manual’s publication month, not an effective deletion date; no effective date is given for SSN 725.

  • The September 1942 regulation and supplements column lists the earlier title “Plotter”; the June 1945 Present Title column is blank.
  • Any replacement classification required review of the individual’s qualifications against the manual’s job specifications.
Source extraction notes

Predecessor title from the June 1944 tentative-manual column: Heavy Artillery Plotter. Suggested conversions/remarks: None; see also 645. 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.