81mm mortar range table

The term "danger close" is included in the call for fire when there are friendly troops or positions within a prescribed distance of the target, specifically 600 meters for artillery or mortars . M3A1 Baseplate .30, BROWNING, M1919A4 AND M2 (HEAVY BARREL), .30, M2 (REPRINTED W/BASIC INCL C1) (S&I BY PROP SEE DETAILS, FOOTNOTES), GUN, MACHINE: CAL. The squad leader points to the exact spot where the mortar is to be mounted. The components of the mortar consist of a cannon, mount, and baseplate. b. If you look at the table above, you'll see that at 1.5km range, 120mm mortars have nearly 33% more dispersion than 80mm mortars.Try testing 80mm mortars and 120mm mortars at 1.5km against . The M252 81mm mortar is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. Placing the mortar in position at night does not relieve the gunner of the responsibility of checking for mask clearance and overhead interference. M64A1 Sightunit. Secure .mil websites use HTTPS Correct way to open an ammunition box. When a large number of cartridges are needed for a mission, they may be removed from the containers and prepared. Mount, M177, in folded position. At extreme temperatures (below -40 degrees Fahrenheit and above 125 degrees Fahrenheit), it is not unusual to experience an increase in malfunctions proportionate to the severity of conditions. The gunner moves the mortar as the assistant gunner steadies it. 60MM M224A1. b. This is the inert PD fuze type "IR-81" used by the Italians for their 81mm mortar rounds during WWII. An air cavity can form on one side of a cartridge to unbalance it, causing instability in flight. It has a time setting of up to 50 seconds. He must not stand directly behind the mortar. a. Point-Detonating. It has four function settings: PRX (proximity) causes the cartridge to explode between 3 and 13 feet above the ground; NSB (near-surface burst) causes the cartridge to explode up to 3 feet above the ground; IM (impact) causes the cartridge to explode on contact; and DLY (delay) incorporates a 0.05-second delay in the fuze train before exploding the cartridge. It is assembled with the M772A1 MTSQ. MC Medical Guide; Client-side mods; TFAR 1.x for players; Official websites use .mil (2) The M524-series fuze has two function settings: superquick/impact (SQ/IMP) and delay. c. Upon receiving the command REFER, REALIGN AIMING POST, two actions take place at the same time in the mortar squad. The term "indirect fire" means firing at an enemy without having a. (6) The primer cartridge is checked for damage or dampness. a. The M374 cartridge is fitted with the M90 propelling charge. He places firing data on the sight and lays the mortar for deflection and elevation. He opens the cross-level handwheel, traversing handwheel, and barrel clamp. Those cartridges assembled with the M524 (A1, A2, A3, or A4) fuze are for use by the US Marine Corps and US Navy only. (2) The breech plug is screwed tightly to the barrel. He ensures that the firing pin recess is facing upwards. All mortar cartridges are painted to prevent rust and to identify their type. h. Where the ground is uneven and there is no level surface for the bipod, the gunner can adjust the plain leg. The mortar is within two turns of center of traverse. The safety/packing clip should be removed when the cartridge is unpacked. The cartridge is dropped down the barrel, fin-end first. The cartridge is painted light green and has red markings and one narrow yellow band. Share sensitive information only on official, secure websites. 4-4. The propelling charge consists of an ignition cartridge and removable propellant increments. Ammunition is made and packed to withstand all conditions ordinarily encountered in the field. (The handle of the wrench is turned counterclockwise.) Fort Belvoir, VA 22060 The M532 fuze is a radio doppler fuze that has a proximity (PROX) or SQ/IMP function. The floating firing pin located within the primer has approximately 1/16 of an inch to move around. If it is necessary to leave the ammunition uncovered, it should be raised on dunnage at least 6 inches above the ground. b. The M375A3 cartridge is ballistically similar to the M374A3 (HE) cartridge. The fuze is set manually to proximity, point detonate, or delay modes. When set at SQ, the fuze functions on point impact or graze contact. (8) To help minimize the occurrence of short rounds and or duds, unpackaged ammunition that has been dropped should not be fired. The section leader, acting as FDC, has one deflection instead of two or more. The 81-mm mortar, M252, is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. It uses the M772 mechanical time fuze and weighs about 10.6 pounds. . ), FIRING TABLES FOR CANNON, 155MM HOWITZER, M185 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A1 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A1B HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A2 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A4 AND CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1 FIRING PROJECTILE, HE, M483A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR, CANNON, 155MM, HOWITZER, M185 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A1 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A1B HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A2 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A4 AND CANNON, 155MM, HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A5 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A6 AND CANNON, 155MM, HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1 FIRING PROJECTILE, HERA, M549 PROJECTILE, HERA, M549A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR CANNON, 155MM HOWITZER, M185 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A1; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A1B; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A2; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A4 AND CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5, M109A6 AND M109A7 AND CANNON, 155MM HOWITZER, M284A2 CHROME ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND M109A7 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777, M777A1 AND M777A2 AND CANNON, 155MM HOWITZER, M776 CHROME ON HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING PROJECTILE, HERA, M549 AND PROJECTILE, HERA, M549A1 (S&I BY PROPONENT, SEE DEAILS, FOOTNOTES. REFER DEFLECTION TWO EIGHT SEVEN FIVE (2875), REALIGN AIMING POSTS. (d) Firing is slowed if mask clearance must be checked before each firing but this can be eliminated if minimum mask clearance is determined. From introduction up to halfway World War 2 the ML 3-inch had a poor range of up to 1.45 km. (4) Extra increments are removed if the cartridge is to be fired with less than full charge. If the fuze does not function as set, it automatically functions at the next lower setting. He exposes 1 inch (25 millimeters) of cross-level shaft and folds the handle. When the fuze of the misfired round reaches the BAD, the assistant gunner stops the round with his thumbs (he does not touch the fuze) and carefully removes it from the barrel. Table 4-1. The assistant gunner attempts to maintain the traversing mechanism on a horizontal plane. As a longstanding partner of armed forces around the globe, Rheinmetall supplies a wide array of mortar systems and ammunition. The bipod provides front support for the barrel and carries the gears necessary to lay the mortar. The removable increments are fitted onto or around the shaft, depending on their type. The sight is laid on two aiming posts (placed out 50 and 100 meters from the mortar) on a referred deflection of 2800 mils and an elevation of 1100 mils. High explosive is used for both fragmentation and blast effect against personnel and light-skinned vehicles. The 0-second boss is wider and differs in shape from the other body bosses; the safe setting position is indicated by the letter "S" on the fuze body. More uniform firing is obtained if ammunition is kept at the same temperature. Firing tables are used to determine the correct charge for firing. If the situation allows for a longer waiting period, the dud can be considered safe for handling after 40 hours. Several types of RP/WP ammunition are described herein. It is fitted with a standard pull wire and safety pin that are removed immediately before firing. If the barrel is hot, the gunner may then apply water to the outside of the barrel until it is cool. This is accomplished by depressing the barrel until the top of the mask is clear. a. The gunner then kicks the barrel several times with his heel in an attempt to dislodge the round. (1) The M935 fuze has two function settings: impact and delay. In any case, the gunner must ensure that the cartridge does not strike an obstacle. The baseplate (Figure 4-5) is of one-piece construction, and supports and aligns the mortar for firing. The assistant gunner cleans the bore and swabs it dry. Remaining increments are repositioned towards the rear of the tail fin assembly when firing the cartridge with horseshoe-shaped increments at less than full charge. on Amazon.com. Check the post SOP before applying the following procedure: (1) Select a place at least 100 meters from the mortar position, parked vehicles, and ammunition piles. The fuze is not intended to function at charge 0. He uses the chain of command to assist him in effecting his command and supervising duties. If not, he may still fire at the desired range by selecting a charge zone having a higher elevation. Developed by Hirtenberger Defence Systems (HDS), the rugged and reliable M8 comprises an 81 mm long-range weapon available in different barrel lengths, an entire range of ammunition, auxiliary field equipment, sighting systems and a fully digital fire-control system containing all ballistic data. Since phosphorus liquefies at about 100 degrees Fahrenheit, the ammunition is protected against an uneven rehardening of the filler. The striker has been modified to be able to use German and Italian patterns of 81mm mortar . The M821A2/821A1/889A1 consists of the following major components: M935 Point Detonating Fuze or M734/734A1 Multi-Option Fuze. Section I. When a misfire occurs, any member of the squad immediately announces, "Misfire." b. (4) The leg-locking handwheel is hand tight. Training practice--M879, M880, M68, and sabot. These are NDI items . The gunner levels the elevation bubble by turning the elevation micrometer knob and reading the setting on the elevation scale and elevation micrometer--this setting is the minimum mask clearance. The gunner should expose 6 inches (150 millimeters) of elevation shaft and center the buffer carrier. If the round does not fire, the gunner tests the barrel for heat. (2) The ribs and braces have no breaks, cracks, or dents. 120mm IHE grenade DM91. The adjustment ring has six raised ribs for use in conjunction with fuze setter, M25, and a setting indicator rib (marked SET) about half the height and width of the other six ribs. It has no safety pins or wires to reduce preparation time. Red phosphorus cartridges (M252 only) are stored the same as HE cartridges. ) or https:// means youve safely connected to the .gov website. They function normally in light rain; however, heavy rain, sleet, or snow can cause an increase in the number of early bursts. Before the mortar is mounted, the squad must perform premount checks. b. Standard A ammunition for the M29A1 mortar is Standard B for the M252 mortar (, Light green Yellow band with red markings. The 81mm mortar is a portable, mobile, medium mortar at the infantry's disposal. d. The M374A2, M374A1, and M374 HE cartridges are painted olive drab with yellow markings and are constructed from pearlitic malleable cast iron. Despite its weight though, the 81mm mortar was an important part of the Table of Organization and Equipment of U.S. Army and U.S. Marine Corps maneuver battalions throughout World War II. Cartridges assembled with the M532 fuze must be fired above charge 0. .50 MACHINE GUN, M3; FIRING CARTRIDGE, CAL. Target terrain, such as ice and dry sand, gives lowest burst heights, whereas water and wet ground give highest burst heights. The table on the right describes the three most common setups. The 0-second boss is wider and differs in shape from the other body bosses; the safe setting position is indicated by the letter "S" on the fuze body. The mortar should be within two turns of center of traverse when the task is compete. He is also the squad driver. The M29 would become the standard American mortar in the upcoming Vietnam War. c. The assistant gunner stands to the right of the mortar, facing the barrel and ready to load. The cartridge is painted olive drab with yellow markings and weighs about 9.05 pounds. It is a smooth-bore, muzzle-loading, high-angle-of-fire weapon used for long-range indirect fire support to light infantry, air assault, and airborne units across the entire front of a battalion zone of influence.