Practice types

General: Practice mines are used in training. These mines can be identified by their blue color and white markings.

M1: The Practice Mine M1 consists of three components: an empty mine body, a spi-der, and a fuze. The parts are similar in construction to the high-explosive mine, except that the body has five one-inch holes equally spaced around the side. The explosive fill-ing consists of a caliber .32 blank cartridge in the fuze, 100 grains of red phosphorus, and 60 grains of black powder.

M1B1: The Practice Mine M1B1 is made of sheet metal and resembles the service mine, except that the filling hole is in the bottom of the mine body. The body is sand-fil-led to weight before it is issued for use in practice. Four sections are cut out of the top of the body near the fuze well, to permit the passage of smoke.

T8E1: The Practice Mine T8E1 simulates the standard Mine M6. It uses the Practice Fuze T20, which simulates the M600, but gives a puff of smoke instead of detonating the mine. Four sections cut out of the top of the body near the fuze well permit the passage of smoke.

M10: The Practice Mine M10 simulates the standard Mine M7A1. It is loaded with 3.4 pounds of inert filler, consisting of Santo wax M, 50%, plaster of paris, 12%, and powde-red iron oxide, 38%. It uses the Practice Fuze T20. Four sections cut out of the top of the body permit the passage of smoke.