要塞砲
Fixed artillery (that which is not meant to move, other than for the purpose of aiming) was placed in forts and batteries in locations where they might protect potential targets (ports, cities, etc.) from attack, or from where they might prevent the advance of an enemy. This included forts and batteries intended to protect against military forces on the land, and against naval forces on the sea. Coastal artillery relied primarily on high velocity guns, capable of striking out at ships at a great distance, and penetrating their armour. Inland defensive batteries might have armament better suited for use against personnel. Mobile (field) artillery pieces were sometimes used that could be quickly re-deployed as required between fortifications that were not permanently manned or armed. Fixed batteries were operated in the early 20th century by the RGA, including its Militia Artillery and Volunteer Force reservists (often with support from other units, such as engineers operating searchlights for night-time firing).