The Four Inch Mortar shall be the standard medium mortar in the British Army,the Home Guard and the Royal Marines and shall equip platoons or troops held at the battalion level.
The Four Inch Mortar shall be issued on the scale of one section of two mortars to every light infantry company,medium infantry company,cavalry squadron,reconnaissance company,reconnaissance squadron and Royal Marines company.
The Four Inch Mortar shall have a smooth bore,be muzzle loaded and fire twenty pound fin stabilised bombs,to a range of five miles,at rates of up to twenty bombs per minute.
The Four Inch Mortar shall use the same indirect fire sight as the Three Eighths Inch Machine Gun.
The Four Inch Mortar shall fire a variety of bombs including,but not limited to,High Explosive,High Explosive Anti Tank,High Explosive Penetrating,Thermobaric,Flechette,Illuminating,Obscuring,Practice and a family of rocket assisted toffee apple bombs.
The Four Inch Mortar bombs shall be able to be fitted with proximity,impact and delay fuses,stand off probes and a variety of terminal homing systems including,but not limited to,active radar,passive thermal,semi active laser and television guidance.
The Four Inch Mortar may be carried by it's crew of five men when operating on foot.
The Four Inch Mortar crew of five men may be carried in the Ox vehicle,with one mortar and it's ammunition being towed in it's unprotected trailer.
The Four Inch Mortar section of ten men may be carried in the Mule vehicle,with two mortars and their ammunition being towed in it's unprotected trailer.
The Four Inch Mortar section of ten men may be carried in the Pony vehicle,with two mortars and their ammunition being towed in it's protected trailer.
The Four Inch Mortar section of ten men may be carried in the Matilda vehicle,with two mortars and their ammunition being carried in an armoured box above the rear door.
The Four Inch Mortar section of ten men may be carried in the Charger vehicle,with two mortars and their ammunition being carried in an armoured box above the rear door.
