The Acoustic Device,countermeasure M, cataloged under National Stock Number 5845-01-027-7136, is classified within Federal Supply Class 5845 (Underwater Sound Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Lockheed Martin Librascope Corporation. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5845-01-027-7136 |
| Primary Part Number | L200-013-399 |
| Item Name | Acoustic Device,countermeasure M |
| FSC / FSG | 5845 / 58 — Underwater Sound Equipment |
| Manufacturer | Lockheed Martin Librascope Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | F/CONFUSING ENEMY SONAR DETECTION; 72.75 IN. LG; 5.00 IN. DIA.; SHIPPED,HANDLED AND CONTAINED WITHIN LAUNCHER,ACOUSTIC DEVICE MK 139 MOD 0 IN |
| Precious Material | SILVER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL G — Ammunition & Explosives |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| L200-013-399 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| Reference | Meaning |
|---|---|
| 5268840 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 5845-01-027-7136 is a Acoustic Device,countermeasure M, manufactured by Lockheed Martin Librascope Corporation, classified under FSC 5845, Underwater Sound Equipment. Status: active.
NSN 5845-01-027-7136 has 1 manufacturer part number on file: L200-013-399 (Lockheed Martin Librascope Corporation).
Key specifications for L200-013-399: General Characteristics Item Description: F/CONFUSING ENEMY SONAR DETECTION; 72.75 IN. LG; 5.00 IN. DIA.; SHIPPED,HANDLED AND CONTAINED WITHIN LAUNCHER,ACOUSTIC DEVICE MK 139 MOD 0 IN; Precious Material: SILVER. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5845-01-027-7136 has DEMIL Code G. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.