80. Ramp Mine

a. Description. The improvised antitank ramp mine (fig. 92) consists of charges fitted with pressure fuzes 35 (par. 24) and laid under a sloping board, or ramp, at railroad cros-sings, bridge approaches, and similar sites.

b. Employment. This mine is installed at railroad crossings and bridge approaches, disgui-sed as a ramp to assist vehicle in crossing.

c. Functioning. Pressure on the sloping board or ramp actuates the pressure fuzes, relea-sing the spring-loaded striker against the percussion caps and firing the charges.

d. Installing and Arming. Hinge together two boards at least 10 inches wide and 6 feet long and lay them with the hinged side toward the enemy. Install the charges with pres-sure fuzes 35, one about every 3 feet, on the lower board, along the open edge of the fuze ramp. Remove the safety pins from the fuzes, and carefully lower the top board onto the fuzes.

e. Neutralizing.

(1)

Examine the mine for activating fuzes and neutralize any that are found.

(2)

Lift the top board.

(3)

Insert safety pins or nails in the safety-pin holes of the pressure fuzes.

(4)

Unscrew the pressure fuzes and detonators from the charges.

(5)

Remove the detonators from the fuzes.

(6)

Remove the charges from the mine.

Figure 92. Improvised antitank ramp mine.