This manual prescribes the service of the piece for the modified 12-inch casemated gun (fig. 1) on the M1917 carriage. Guns, carriages, and batteries differ in type, arrangement, and design, and for this reason the service of the piece as prescribed in this manual is intended only as a guide for the battery commander in the assignment of individuals and duties. Changes in the details of the service of the piece to meet local conditions may be made. Where the battery is lacking in all or some of the modifications mentioned in b below, the battery commander should refer to FM 4-60. b. The modifications of the gun and carriage consist of the following: (1) Air-pressure and gas-ejection system. (2) Magneto-transformer firing system. (3) Power rammer.
DesignationFM 4-61
EditionDec 1944
StatusSuperseded
Pages88
FunctionFires
CollectionHistoric
Public domain (U.S. Government work)