Figure 2-43. 8-inch antipersonnel projectiles.
Howitzer Fuzes. Since all howitzer cartridges are issued as separate-loading items, fuzes must be matched
to the projectile bodies. Fuze and projectile combinations are given in TM 43-0001-28, Appendix A. Fuzes are
classified according to the method by which they function (PD, MT, MTSQ, electronic time [ET], and PRX). The
paragraphs that follow list and describe some of the fuzes that may be encountered with howitzer projectiles.
Examples of PD fuzes are shown in Figure 2-44. The M557-series PD fuzes can be used with all types of
howitzer projectiles. They are designed to function on impact or superquick, depending on the option selected.
The M739-series PD fuzes are designed to be used with all standard HE artillery cartridges. These fuzes can
function on impact or superquick, depending on the option selected.
Examples of MT and MTSQ fuzes are shown in Figure 2-45. The M565 MT fuze is designed to detonate a variety
of spin-stabilized projectiles. The M565 fuze is a straight MT fuze. It does not use a superquick function.
The M571 MT fuze is designed especially for use with the M494 flechette-loaded 105-millimeter cartridge. It is a
straight MT fuze, but it is graduated in meters rather than in seconds.
M520-series MTSQ fuzes are designed for use with a variety of projectiles to achieve either an air burst or
superquick action upon impact.