FM 3-22.91: MORTAR FIRE DIRECTION PROCEDURES
Official US Army Field Manual in Acrobat PDF file format.
This manual provides guidance for military occupational specialty (MOS) 11C Soldiers and their trainers on the employment of the 60-mm mortars (M224), 81-mm mortar (M252), and 120-mm mortar (M120). It discusses the practical applications of ballistics and a system combining the principles, techniques, and procedures essential to the delivery of timely and accurate mortar fire. (See FM 3-22.90 for information about mechanical training, crew drills, and the characteristics, components, and technical data of each mortar.)
This manual is divided into six parts. Part 1 discusses the fundamentals of mortar fire direction; Part 2 summarizes the operational procedures of a fire direction center (FDC); Part 3 describes the capabilities and use of the mortar ballistic computer (MBC); Part 4 describes the capabilities and use of the M16/M19 plotting boards; Part 5 discusses the Mortar Fire Control System (MFCS); and Part 6 discusses the lightweight handheld mortar ballistic computer (LHMBC).
This manual was revised to delete references to obsolete material and systems and add references to new material and systems. In addition to various editorial corrections, this revision—
ô€?º Removes all references to M2 and M19 mortar systems, as they are now obsolete.
ô€?º Removes all references to M29 and M29A1 mortar systems, as they are now obsolete, except for M29A1 use with the M303 subcaliber insert.
ô€?º Adds references to the LHMBC.
ô€?º Replaces references to common terms with their accepted modifications.
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