Internal workings of Royal Navy battleship 15 inch gun breech mechanism

Animation showing component parts of Royal Navy 15 inch gun breech mechanism 00:00 - Start 00:48 - Breech Screw 02:04 - Axial Vent 03:12 - Latch Retaining Breech Screw Closed 03:46 - Box Slide 04:27 - Electric Lock 05:10 - Actuating Gear 06:13 - Hinge Bolt 06:40 - Hand Operating Gear 06:55 - Hydraulic Operating Gear 08:28 - Breech Safety Contacts 09:06 - Air Blast System