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C1, FM 6-40/MCWP 3-16.4

Change No. 1

HEADQUARTERS DEPARTMENT OF THE ARMY Washington, DC, 1 October 1999

Tactics, Techniques, and Procedures for

FIELD ARTILLERY
MANUAL CANNON GUNNERY

FM 6-40/MCWP 3-16.4, April 1996, is changed as follows:

1. Change the following paragraphs or sections (changes are in bold type):

Replace Paragraph 6-1, Page 6-1 with the following:

6-1. Description

A firing chart is a graphic representation of a portion of the earth's surface used for determining distance (or range) and direction (azimuth or deflection). The chart may be constructed by using a map, a photomap, a gridsheet, or other material on which the relative locations of batteries, known points, targets, and observers can be plotted. Additional positions, fire support coordinating measures, and other data needed for the safe and accurate conduct of fire may also be recorded.

Replace Step 5, Table 6-6, Page 6-19 with the following:

5

Place a plotting pin opposite the number on the azimuth scale (blue numbers) on the arc of the RDP corresponding to the last three digits of the azimuth in which the arm of the RDP is oriented. The location of the pin represents a temporary index and will not be replaced with a permanent index. The value of the pin is the value of the first digit of the azimuth in which the arm o f the RDP is oriented. Use the rules outlined in step 4 of Table 6-5 to determine where the pin should be placed. In Figure 6-15, the azimuth of lay is 1850, so the RDP has been oriented east (1600 mils).

Replace Figure 7-1, Page 7-1 with the following:

STANDARD CONDITIONS
WEATHER
1	AIR TEMPERATURE 100 PERCENT (59° F)
2	AIR DENSITY 100 PERCENT (1,225 gm/m3)
3	NO WIND

POSITION

1	GUN, TARGET AND MDP AT SAME ALTITUDE
2	ACCURATE RANGE
3	NO ROTATION OF THE EARTH

MATERIAL

1	STANDARD WEAPON, PROJECTILE, AND FUZE
2	PROPELLANT TEMPERATURE (70° F)
3	LEVEL TRUNNIONS AND PRECISION SETTINGS
4	FIRING TABLE MUZZLE VELOCITY
5	NO DRIFT

LEGEND: gm/m³ - grams per cubic meter

Replace Table C-6, page C-18, with the following

Table C-6. Target Acquisition Method.

TLE = 0 Meters (CEP)	TLE = 75 Meters (CEP)	TLE = 150 Meters (CEP)	TLE = 250 Meters (CEP)
Forward observer with laser Target area base Photointerpretation Airborne target location	Counterbattery Radar Airborne infrared system Flash ranging Countermortar radar	Sound ranging	Forward observer w/o laser Air observer Tactical air Forward observer (non FA) Long-range patrol Side-looking airborne radar Communications intel Shell reports

 

2. Remove old pages and insert new pages indicated below:

REMOVE PAGES	INSERT PAGES
8-16	8-16
15-7 TO 15-25 (Including Figure 15-22 on page 15-26)	15-7 TO 15-45

3. Insert new pages as indicated below:

INSERT PAGES
13-77 to 13-82

4.File this transmittal sheet in the front of the publication for reference.

DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited.

 

---

 

FM 6-40
MCWP 3-16.4
1 October 1999

 

 

By Order of the Secretary of the Army:

 

Official:

                            0011015

 

By Direction of the Commandant of the Marine Corps:

Lieutenant General, US Marine Corps Commanding General Marine Corps Combat Development Command

 

DISTRIBUTION:

Active Army, Army National Guard, and U.S. Army Reserve: To be distributed in accordance with initial distribution number 110044, requirements for FM 6-40/MCWP 3-16.4.