Mortar Operation

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This guide aims to provide a basic and simple understanding of how to operate the Mk6 mortar in Arma 3 with ACE 3. Whenever you are employed in a mortar role you are expected to use these skills in an competent and accurate manner. A working knowledge of ACE 3, map reading, and basic navigation equipment is required. These steps must be practiced and refreshed. The steps presented in this guide will enable the user to conduct a basic fire mission on their own from start to finish allowing them to be effective within a mortar crew.

NATO mortar team fire the Mk6 mortar

How to

In order to operate the Mk6 mortar in an indirect fire role the following equipment is required:

Folded Mk6 mortar tube*, Folded Mk6 mortar bipod. (Backpacks)

Individual 82mm mortar rounds (HE, Smoke, Illumination) (Item)

82mm range tables. (Item)

Map, map tools**, map light, compass. (Item)

Radio, earplugs. (Item)

*or Folded Mk6 60mm Tube and Bipod.

**Textures set to HIGH to read indexes.

Setting up


To set up the Mk6 Mortar you must have both pieces with one of them being on the ground in front of you and one being in your backpack slot. Select the action: Assemble Mk6 Mortar.


Once assembled you can carry or drag the weapon by using ACE interaction. To tear down the mortar make sure you are out of it and select the action: Disassemble Mk6 Mortar.

Make sure to have mortar ammunition in your inventory so you can load the mortar later.

Mk6Guide Setup4.jpg

Calculating firing data


In order to aim and fire the mortar correctly in an indirect role you must produce firing data. Firing data can be broken down into two categories: map data, and gun data. Map data pertains to general positional information determined through the use of the map while gun data pertains to a particular weapon system such as the Mk6 mortar. A target is required to calculate firing data.


Map Data

Determine the grid and altitude of the mortar and plot the location on the map.

Mk6Guide Calc1.jpg
Mk6Guide Calc2.jpg

Grid: 0300 0673, Altitude 370m

Determine the grid and altitude of the target and plot the location on the map.

Mk6Guide Calc3.jpg
Mk6Guide Calc4.jpg

Grid: 0558 0381, Altitude 171m

Determine the altitude difference between the mortar and the target. Add or subtract the target altitude from the mortar altitude whether it’s above or below the mortar altitude. You must be aware of the target altitudes difference to the mortar because it affects the accuracy.

370 - 171 = 201m, Alt Diff: -201m (target is below the mortar)

Determine the direction in mils and distance in meters to the target.

Mk6Guide Calc5.jpg
Mk6Guide Calc6.jpg

Direction 2460, Distance 3880m

Once you have determined these things you have produced map data which can be used to produce gun data for your mortar to lay onto target.

Grid: 0558 0381

Altitude: 171

Direction: 2460

Distance: 3880

Alt Diff: -200


Gun Data

Determine the ammunition type to be fired. High Explosive, Smoke, and Flares are available.

Open the range tables by selecting: Self interact > Equipment > Open 82mm Rangetable.

Select the charge increment that covers the distance to the target. The ranges are listed in the range column for the various distances. Charges allow the projectile to move greater distances and increase the time of flight.

Mk6Guide Calc7.jpg

Charge 2

In the elevation column find the elevation that corresponds to your distance in the range column. This is the base elevation for that range. If the altitude difference is less than 100m then you don't need to calculate the next two steps. Use this number as your calculated elevation.

Mk6Guide Calc8.jpg

Elevation 952

Elevation Difference

Find the elevation difference value under D Elev per 100m DR column.

Mk6Guide Calc9.jpg

D Elev per 100m DR 27

Now you must calculate the elevation by using the base elevation number and elevation difference per 100 meters number.

If the target is 200m below the mortar multiply the number by 2 and add it to the base elevation.

If the target is 200m above the mortar multiply the number by 2 and subtract it to the base elevation.

27 x 2 = 54

952 + 54 = 1006

Elevation 1006



Map data and gun data has been determined resulting in firing data being produced in the form of ammunition, charge, direction, and elevation.

HE, Charge 2, Direction 2460, Elevation 1006


Indirect firing


Load the ammunition type by aiming at the mortar tube and selecting: Interact > Load Mortar > Load (type).

You must have the ammunition items in your inventory. To unload select: Interact > Remove Round.

Mk6Guide Indirect1.jpg


Once in the gunners seat of the mortar you will be presented with the gunners sight. Using the previously calculated firing data you can apply the data onto the Mk6 mortar.

Select the charge increment by pressing F (Fire Mode Switch).

Mk6Guide Indirect2.jpg

Traverse the mortar to the calculated direction by moving your mouse Left and Right.

Mk6Guide Indirect3.jpg

Align the mortar to the calculated elevation by pressing Page Up or Page Down. Include Shift for single digit increments.

Mk6Guide Indirect4.jpg

Verify that the ammunition, charge, direction, and elevation values have not accidently changed while applying settings. The mortar is now laid onto the target and ready to fire.

Mk6Guide Indirect5.jpg

Fire the mortar by pressing the Left mouse button (Fire).

The mortar bomb will move towards the target you have calculated and oriented onto and deliver effects on the ground.

Mk6Guide Indirect6.jpg

You have now completed all necessary steps to firing the Mk6 mortar indirectly.


Considerations

If you want to make the rounds drop further decrease elevation.

If you want to make the rounds drop closer increase elevation.

If the direction is not correct to the target it will increase in error over a larger distance.

Keep the charge increment consistent throughout your firing on a single target.

Difference in altitude affects the trajectory and must be taken into account for accuracy.

Linear interpolation of the range tables for specific distances not listed will allow for more precise elevations.

Deploy the mortar on an altitude that will closely match the target altitudes to reduce calculations required.

Keep track of ammunition remaining.

When adjusting figure out the correction that needs to be made by recalculating map and gun data for the new location in relation to the old location. example: Northeast 150m

Direct firing


To fire the Mk6 mortar in the direct role you must have line of sight from the weapon to the target.

Load the ammunition type by aiming at the mortar tube and selecting: Interact > Load Mortar > Load (type).

You must have the ammunition items in your inventory. To unload select: Interact > Remove Round.

Mk6Guide Indirect1.jpg

Once in the gunners seat, traverse the mortar to the direction of the target by moving your mouse Left and Right. Aim the sight at the ground in front of the target.

Select the charge increment by pressing F (Fire Mode Switch).If the charge increment is not suitable for the current distance then a red X will appear with the warning [Range] below.

Mk6Guide Direct2.jpg

Once a suitable charge has been selected a relative elevation [REL] will appear below the elevation value and the red X will go away. Align the mortar to the relative elevation by pressing Page Up or Page Down. Include Shift for single digit increments.

Mk6Guide Direct3.jpg

The mortar is now laid onto the target and ready to fire. Fire the mortar by pressing the Left mouse button (Fire).

Mk6Guide Direct4.jpg

Operating in a mortar crew


Operating a crew served weapon requires teamwork and coordination. All members of the team should understand their role and what is required to complete various task. The mortar team can be broken down into two key positions, mortar commander and mortar gunner.

Mortar commanders are responsible for selecting a position for the mortar, communicating with the supported group, producing firing data for the gunner, and supervising the operation of the mortar.

Mortar gunners are responsible for operating the mortar in the indirect and direct roles by applying firing data onto the mortar as ordered and firing as ordered.

an assistant may also be employed to carry ammunition and equipment as well as act as security or relief to the team.

Orders should be given clearly and consistently. Information should be double checked and acknowledged. Fire discipline is important for communication within the team and effectiveness in support of other groups. Common prowords and formats should be understood and applied.

Common prowords include the following: Grid, Altitude, Direction, Distance, Ammunition, Charge, Elevation, Fire Mission, Adjust Fire, Fire For Effect, # Rounds, At My Command, Shot, Rounds Complete, Check Firing, End of Mission.

A consistent orders format should be used when issuing orders to the mortar team. Orders should be given in a packet and acknowledged, read back, or repeated after they have been initially given. It is suggested to use the following orders format or develop or use another format and brief the mortar team once in game.

Mk6Team.jpg
Mortar Fire Orders
Order Example
Warning Order (Alert) Fire Mission #1
Method of Fire (# of rounds) 5 Rounds
At my Command (Fire Control) At my command!
Ammunition (Projectile, Charge) HE, Charge 2
Direction Direction 2460
Elevation Elevation 1006

The convention for firing is to fire the number of rounds ordered once the mortar is ready unless at my command has been ordered. At my command must be acknowledged by the gunner and the Fire order given by the commander. Rounds complete should be reported by the gunner once the method of fire is concluded. The commander should always verify that the gunner has inputted the firing data correctly by getting in the weapon and doing a double check prior to firing the first round in a fire mission. To remember the orders format use a mnemonic such as: Will My Artillery Destroy Everyone?

Links

Mortar Calculator - Created by Starfox64

Credits

United Operations - Darksidesix