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)

6.4.6 Battery. The term "battery" shall mean the Battery, Water

Activated Mk 72 Mod 1 as depicted in OS 8765.

6.4.7 Squib. The term "squib" shall mean the Squib, Electric, Mk 13

Mod 0 depicted in Specification WS 4630.

6.4.8 Starter composition. The term "starter composition" shall mean

the starter composition depicted in Specification WS 4626.

6.4.9 Sea water. The term "sea water" as used in the static function-

ing test shall mean a sea water solution prepared by the following formula:

Ingredients

Grams

Sodium Chloride, Federal Spec

32.0 � 0.1

SS-S-550, Type II, Grade A

Magnesium Sulfate Heptahydrate

4.0 � 0.03

ASTM C 277-53

Dissolve the above ingredients in 500 + 5 milliters of distilled waters

then dilute the solution to volume of 1 � .01 liter. As much solution as

needed may be made in multiples of this quantity.

6.5 Conflicting requirements. Conflicting requirements arising between

this specification and any specification or publication listed herein shall

be referred in writing to the procuring agency for clarification.