This is the standard tactical dosimeter in use today. It is a direct reading instrument capable of detecting and recording a total dose of up to 600 rads. It is termed a pocket dosimeter and is about the size and shape of a fountain pen.

Figure 9-9.-M13 portable decontaminating apparatus.

AN/PDR-27 Radiac Set

It contains a low-range dose rate of a Geiger-Mueller type of instrument, used for monitoring contamination of personnel, food, and equipment. It measures gamma and detects beta radiation.

ABC-M11 Portable Decontaminating Apparatus, DS2

The ABC-Ml1 apparatus (fig. 9-8) decontaminates small areas, such as the steering wheel or other equipment, that Seabees must touch. It is a steel container with an aluminum spray-head assembly and a nitrogen-gas cylinder that provides the pressure. It is filled with 11/3 quarts of DS2, which is sufficient for covering 135 square feet. The effective spray range is 6 to 8 feet. After each use, refill the Ml1 with DS2 and fit it with a new nitrogen cylinder. It is now ready to use again.

M13 Portable Decontaminating Apparatus

Use the M13 apparatus to decontaminate vehicles and crew-served weapons larger than .50 caliber. The Ml 3 (fig. 9-9) is about the size of a 5-gallon gasoline can. It comes prefilled with 14 liters of DS2 decon agent. Decon capability is 1,200 square feet. A hose assembly, pump assembly, wand assembly, and brush are attached to the fluid container for disseminating DS2. The brush is for removal of thickened agents, mud, grease, or other material.