GERMAN UNDERWATERS ORDNANCE MINES |
Chapter 8 - CONTROLLED MINES |
THE RM MINES |
RM Mines Used as Influence Mines. When the mine was launched, water pressure operated the booster-release mechanism and, at a depth of 15 feet, depressed the clock spindle, starting the clock. The clock ran off its delay setting, and the firing unit began its arming cycle. |
No self-disarming devices were fitted. |