Characteristics

Action - Impact, instantaneous or 0.01-sec. delay. (Similar to Fuze AN-M103A1 except for delay.)

Modification - M139 is similar to Fuze AN-M103 except for 0.01-sec. delay time. Fuze AN-M139A1 incorporates added safety features of Fuze AN-M103A1.

AN-M139A1 - Service.

Restriction on Use - M139 - Not to be used by Naval activities because of inadequate safety features. AN-M139A1 - No restrictions.

510 ft. for delay.

765 ft. for instantaneous.

Figure 75. - Outline Drawing of Nose Fuze AN-M139A1

Bombs in Which Used

1000-lb. Aircraft Mine AN-Mk 13 Mod 1

90-lb. Frag. Bomb M82

All bombs* weighing 100 lb. and over that receive a nose fuze except Chemical Bomb AN-M47A2, Chemical Bomb M70, and Navy 100-lb. G.P. Bomb Mk 4 and Mods.

*One auxiliary booster is required when used in Navy bombs. Must use special vane as-sembly and set on INST. when used with flat-nosed depth bombs.

Figure 76. - Nose Fuze AN-M139A1

Weight and Packing

Standard Packing - Twenty-five fuzes, each in a metal container, are packed in a woo-den crate measuring 22.3 in. x 17.3 in. x 9.2 in. and weighing 132 lb. gross.