Chapter 11 - Influence Mine Units - SVK and Luftwaffe; Section 2 - Magnetic Units - M 103 Unit: M 103 OperationChapter 11 - Influence Mine Units - SVK and Luftwaffe; Section 3 - Acoustic Magnetic Units - A 1 Unit
GERMAN UNDERWATERS ORDNANCE MINES
Chapter 11 - INFLUENCE MINE UNITS - SVK AND LUFTWAFFE
Section 3 - ACOUSTIC MINE UNITS

The German Navy and Luftwaffe made considerable use of Sonic Acoustic Units in mining. Since the first sonic acoustic mine was laid in 1940, several different types of sonic acoustic units have been used, and several more were in advanced development just prior to being used operationally at the end of the war in Europe.

The German sonic acoustic mine units include the following:

A 1 Navy TMA/TMB Ground
A 1st      
A 2 Navy TMB/TMC Ground
A 2st      
A 3 Navy EMF/SMA Moored
A 4 Navy TMA/TMB/TMC Ground
A 4st      
A 7 Navy EMF/SMA Moored
A 104 Luftwaffe BM 1000 Ground
A 104st      
A 105 Luftwaffe BM 1000 Ground
A 105st      
A 107 Luftwaffe BM 1000 T Moored
    BM 1000 Ground

Any of the units specified may be altered by the introduction of a "stumpf" (insensi-tive microphone) and other small modifications to make an anti-mine-sweeper unit. Its designation is changed accordingly, eg: A 4st (A 4 - stumpf).