OP 1673A - German Underwater Ordnance; Chapter 11 - Influence Mine Units - SVK and Luftwaffe; Section 1 - Influence Firing Devices - Tables: Influence Mine Units

GERMAN UNDERWATERS ORDNANCE MINES

Chapter 11 - INFLUENCE MINE UNITS - SVK AND LUFTWAFFE

Section 1 - INFLUENCE FIRING DEVICES - TABLES

INFLUENCE MINE UNITS - LUFTWAFFE

Figure 132 – Table of Influence Mine Units – Luftwaffe

Unit	Principle	Mfr.	Development		Case	Remarks
Unit	Principle	Mfr.	Start	End	Case	Remarks
M 101*	Magnetic	A.E.G.	Winter 1939	Fall 1940	BM 1000 I/II	Magnetic balance for ver- tical component.
M 103*	Magnetic	A.E.G.	Summer 1940	Spring 1941	BM 1000 I/II	Same as M 101, except that it responds to either a red or blue field.
MA 101*	Magnetic- Acoustic	A.E.G.	Winter 1940	Fall 1941	BM 1000 H/M	Magnetic section like M 103 acoustic section consists of four microphones, transfor-mers, and an amplifier. Mag-netic Triggers acoustic. Fires when sound reaches a certain intensity.
MA 102*	Magnetic- Acoustic	A.E.G.	1941	1942	BM 1000	Further development of the MA 101 with a more sensi- tive magnetic section.
A 104*	Acoustic	Hell	Spring 1941	Spring 1942	BM 1000 I/II	Sound must reach a certain intensity before firing Shock-blocking. Has a frequency response of 50 to 300 cps.
A 105*	Acoustic	Hell	Spring 1942	Fall 1943	BM 1000 I/II	Same as A 104 except that sound must reach certain level within a definite time of fire.
A 105*	Acoustic	Hell	Spring 1942	Fall 1943	BM 1000 I/II	Same as A 105 but with "stumpf" microphone.
A 107	Acoustic	Hell & Goepke	Spring	---	BM 1000 I/II/T	Further development of the A 105, with a rate-of-change circuit.
AB 104*	Acoustic- Pressure	Hell	Fall 1942	Fall 1943	BM 1000 I/II	A 104 plus D 101 unit 4-6 or 6-8 sec. delay in D 101 circuit at 20-30 mm suction.
DA 102	Pressure- Acoustic	Hasag	Summer 1943	Summer 1944	BM 1000	Combination of D 102 unit "Permissive" A circuit. A cir-cuit uses a Hasag microphone. Must have a sustained suction of 5-9 seconds.
DA 112	Pressure- Acoustic	---	---	---	BM 1000 H/M	Further development of the DA 102.
DA 122	Pressure- Acoustic	---	---	---	BM 1000 H/M	Development of the DA 102, with "stumpf" microphone.
DA 132	Pressure- Acoustic	---	---	---	BM 1000 H/M	Development of the DA 102 with normal acoustic and "stumpf" D 102 unit.
DA 142	Pressure- Acoustic	---	---	---	BM 1000 H/M	Development of the DA 102 with normal acoustic and normal pressure but must have sustained suction of about 18 seconds.
DA 152	Pressure- Acoustic	---	---	---	BM 1000 H/M	Development of the DA 102; the acoustic unit works on a rate-of-change principle simi-lar to the A 105; normal pres-sure unit.
DA 162	Pressure- Acoustic	---	---	---	BM 1000 H/M	Development of the DA 102, but no other information available.
D 103	Pressure	Hasag	Fall 1942	Summer 1943	BM 250	Fires on pressure actuation only. Requires a continuous suction of 3 seconds; sensi-tivity of 15 to 30 mm water.
D 113	Pressure	Hasag	---	---	BM 250	Development of the D 103. Must have a sustained suc-tion of 6-7 sec. and a sus-tained pressure of 2-3 sec.; sensitivity of 10 to 20 mm of water.
D 123	Pressure	Hasag	---	---	BM 250	Development of the D 103. Must have a sustained suc- tion of 6-7 sec. and a sus-tained pressure of 2-3 sec.; sensitivity of 10 to 20 mm water.
D 133	Pressure	Hasag	---	---	BM 250	Development of the D 103. Must have a sustained suction of 2-3 sec.; sen- sitivity of 80-100 mm of water (stumpf).
AA 106	Acoustic- Super- sonic combina- tion	A.E.G. Atlas	Spring 1943	Winter 1944	BM 1000 H/M	Acoustic triggers directional supersonic. Two supersonic receivers (magnetstrictive), one vertical and one hori- zontal. Amplitude received by horizontal controls sensitivity of vertical. Frequency of 25 Kc.
AE 101	Acoustic- Echo com- bination	ELAC	Summer 1942	Summer 1944	BM 1000 H/M	Acoustic triggers vertical echo unit. Fires when 10-foot depth decreases occurs at proper minimum rate.
AJ 102	Acoustic- Induction	Hell	Spring 1944	Summer 1944	BM 1000 J III	British-type vibrator and coil-rod in parallel produce high frequency transients.
JDA 105	Induction- Pressure- Acoustic	A.E.G.	Spring 1943	Autumn 1944	BM 1000	Induction triggers pressure, and the pressure triggers the acoustic.
MA 105	Magnetic- Acoustic	A.E.G.	Spring 1943	Winter 1944	BM 1000 H/M	Improvement of the MA 101; acoustic amplifier improved and the magnetic part more sensitive (5-mg.)
MDA 106	Magnetic- Pressure- Acoustic	A.E.G.	Fall 1944	Not complete	BM 1000 H/M	MA 105 plus pressure unit.
S 101	Clock- work	A.E.G.	Fall 1944	Winter 1944	BM 1000	Water flap must be closed for 30 sec. continuously. Mine will fire when present time (72-hour max.) has run off.
S 102*	Optical	A.E.G. Hell	Fall 1944	Winter 1945	Wasser- balloon	Passive optical unit designed for use against bridges.
S 103	Optical	D.V.L.	Fall 1944	Not complete	Wasser- balloon	Similar to S 102; passive op-tical unit with 6 photo-elec-tric cells.
S 104 S 105	Optical	A.E.G.	Fall 1944	Not complete	Wasser- balloon	Active acoustic unit with transmitter and receiver; light flashing method (13 flashes/sec.)

* Used operationally