Raschen Bag
Encyclopedia
A Raschen Bag is a bag of ballast that is placed underneath the baseplate of a mortar
Mortar (weapon)
A mortar is an indirect fire weapon that fires explosive projectiles known as bombs at low velocities, short ranges, and high-arcing ballistic trajectories. It is typically muzzle-loading and has a barrel length less than 15 times its caliber....

 to improve its accuracy when used on snow or other soft ground conditions. They are named after Colonel Dan Raschen, Royal Engineers
Royal Engineers
The Corps of Royal Engineers, usually just called the Royal Engineers , and commonly known as the Sappers, is one of the corps of the British Army....

, who invented them.
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