"This manual encompasses all aspects of field artillery gunnery for cannons. The material presented herein is applicable without modification to both nuclear and nonnuclear warfare."--Page 1-1.

"This copy is a reprint which includes current pages from Changes 1 and 2."--Front cover. "This manual supersedes FM 6-40, 9 November 1960, including C 1, 20 July 1962, C 2, 16 September 1964, and C 3, 17 March 1966."--Page i. Caption title.

Part oneGeneral -- Introduction -- Fundamentals of field artillery gunnery -- Part two Firing battery -- Firing battery, general -- Firing battery procedures -- Firing battery operations and training -- Firing without a firing chart -- Part three Observer procedures -- Field artillery observation -- Location of targets -- Calls for fire -- Adjustment procedure by ground observer -- Adjustment of fire by the air observer -- Fire for effect -- Adjustment procedure for special situations -- Illustrative examples -- Part four Fire direction -- Fire direction, general -- Chart data -- Firing data -- Fire direction procedures -- Conduct of registrations -- Determination and application of registration corrections -- Meteorological corrections and velocity error -- Calibration -- Calibration, position, and special corrections -- FDC procedures for special situations -- FDC procedures for high-angle fire -- Observed firing charts -- Part five Miscellaneous -- Target analysis and attack -- Service practice -- Duties of the safety officer -- Nuclear delivery techniques for cannon artillery -- Aerial photographs -- Naval gunfire support -- Armor employed in a field artillery mission -- Appendix References.