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| GERMAN UNDERWATERS ORDNANCE MINES |
| Chapter 11 - INFLUENCE MINE UNITS - SVK AND LUFTWAFFE |
| Section 2 - MAGNETIC UNITS |
| M 1 UNIT AND MODIFICATIONS |
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M 1 (2nd Revision) Unit Circuit - Operation (Figure 140). |
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Arming. Same as the M 1, except that, as the preset sensitivity is applied, S4 closes momentarily even if S2 has opened properly; the purpose being to make doubly sure that S2 is open at the completion of the operation. |
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Normal Firing and Anti-Countermining. Same as the original M 1. |
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