L (L is the initial letter of the word long) - longevity 48 hours. M741 RAAM-S (S is the initial letter of the word short) - life 4 hours. RAAMS mines are cylindrical with a diameter of 12 cm and a height of 6 cm and weigh 1.7 kg. The fuse is activated by a magneto that detects a change in the magnetic field when a vehicle approaches. M70, m73.