| Year | 1916 |
| Weapon Type | [@type] |
| Origin & Designer | Heavy Howitzer |
| Numbers Produced | 27 |
| Crew | 12 |
| Calibre | 233.6mm |
| Elevation | -15° to +50° |
| Traverse | 15° Left & Right |
| Breech | Asbury Interrupted Screw |
| Recoil | Hydropneumatic |
| Gun Sight | [@gun_sight] |
| Gun Mount | [@gun_mounts] |
| Carriage | Siege Carriage |
| Trailers | [@trailers] |
| Gun Shield | [@gun_shield] |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 4.330mm |
| Overall Length | [@length] |
| Width | [@width] |
| Height | [@height] |
| Weight | In Action: 16.620 kg |
| Round Weight | 130 kg (Bagged Charge) |
| Muzzle Velocity | 490 m/s |
| Feed | [@feed] |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | [@practical_rate_of_fire] |
| Rate of Fire | 1 r.p.m. |
| Maximum Rate of Fire | [@maximum_rate_of_fire] |
| Maximum Ceiling | [@maximum_ceiling] |
| Maximum Ground Range | [@maximum_ground_range] |
| Maximum Range | 12.742m |
| Armour Penetration | [@armour_penetration] |
| Traction | Motorised (Three Loads) |
| Variants | [@variants] |
| Notes | The BL 9in was really a siege gun and was issued in heavy brigades along with other pieces. It used in World War One in the counter battery role. The howitzer was still in service in 1940 and six heavy batteries were took to France with the BEF. The remaining weapons were used to defend Britain. |