MIL-M-81392 Marker, Location, Marine Mk 25 And Mods 2 And 3This specification covers the manufacture, assembly, preparation for delivery of the Marker, Location, Marine MK 25 and Mods 2 and 3, and the methods of examination and tests upon which product acceptance shall be based. The marker consists of an aluminum body containing a pyrotechnic composition which produces a yellow flame and white smoke when electrically initiated by Mk 13 Mod O Electric Squib which is activated by a Mk 72 Mod 1 Water Activated Battery. The base of the marker contains a safe-arm feature that seals the battery cavity. The marker is classified as Class B Explosives \( Code of Federal Regulations 49 CFR 71-78\) and IIC Explosives \(Coast Ward Rules and Regulations for Military Explosives and Hazardous Munitions CG 1.08\).

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MIL-M-81392(AS)

TABLE I (continued)

NOTES:

Denotes tests applicable to plan.

Ac = Acceptance number

3 Re = Rejection number

Samples used from the vent release force test shall not be returned

to the lot.

4 For requirement (a) on the Mk 25 Mod 2 Marker, use an AQL of 1.5

percent defective and on the Mk 25 Mod 3 Marker, use an AQL of

2.5 percent defective.

4.1.3 Test equipment and gages. All test equipment and gages shall be

supplied and maintained by the contractor as specified in Specification

MIL-I-45607. The contractor shall maintain a calibration system as specified

in Specification MIL-C-45662.

4.1.5.1 Test conditions. The maximum allowable tolerances on test

conditions specified herein shall be as follows:

Plus or minus

Temperature:

Plus 5 percent, minus 0 percent.

2. Relative humidity:

3. Vibration amplitude

Plus or minus 10 percent.

4. Vibration frequency: Plus or minus 2 percent.

4.2 Examinations. Random samples shall be selected and examined as

specified in 4.1.1 or 4.1.2 as applicable.

4.2.1 Components; assemblies and materiels examinations. Prior to

assembly all components, assemblies and materials used in the marker shall

meet the requirements of 3.2.1.

4.2.1.1 Squib examinations. In the absence of previous inspection of

the Squib, Electric, Mk 13 Mod 0, inspection shall be performed as specified

in Specifications 4630.

4.2.1.2 Battery examinations. In the absence of previous inspection of

the Battery, Water Activated, Mk 72 Mod 1, inspection shall be performed as

specified in Specification OS 8765.

4.2.1.3 Starter composition examinations. In the absence of previous

inspection of the starter composition inspection shall be performed as

specified In Specification WS 4626.

4.2.2 Marker examinations. Examinations shall be made to ascertain

that markers meet the requirements of 3.2.2. If the number of defective

markers equals or exceeds the rejection number for any category the lot

represented shall be rejected. Only markers containing none of the defects

listed in Table II shall be used for further testing or returned to the lot.