21. The homebank of the canal ( on the Lahore side ) was lined with concrete pill-boxes with over-lapping arcs of fire . 22. This unique center-hand drive enables flexible weapon configurations on both sides of the driver position for a wide arc of fire . 23. The rear guns had an arc of fire of 105?and could fire on targets within about 10?of the centerline. 24. The single 12-inch gun was mounted on a turntable and could pivot at each gun port to maximise its arc of fire . 25. The ships'main armament consisted of two smoothbore Dahlgren guns mounted in a single turret that had an arc of fire of 300? 26. The G . III was also the first bomber to have a tail gun with a potential 360 degree arc of fire . 27. Zealandia Bank is one of 18 units within the Mariana Arc of Fire National Wildlife Refuge, ( a . k . a. 28. This significantly limited the gun's ability to fire to the opposite beam as the superstructure still restricted each gun's arc of fire . 29. Trials revealed the limitations of these positions with poor arcs of fire and the gun shields obstructed the aimer's view of the target. 30. It had an arc of fire of 360? meaning that they could rotate a full circle, able to fire at any given point.