本规范涵盖标记器的制造、组装、交付准备、位置、船用MK 25和Mods 2和3，以及产品验收所依据的检查和试验方法。该标记由一个铝体组成，其中含有一种烟火成分，当由Mk 13 Mod O电点火管电启动时，该电点火管会产生黄色火焰和白色烟雾，该电点火管由Mk 72 Mod 1水激活电池激活。标记器的底座包含一个密封电池腔的安全臂功能。标记物被归类为B类炸药（联邦法规49 CFR 71）- 78）和IIC炸药（军用炸药和危险弹药海岸区规则和条例CG 1.08）。

This 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).