Chapter 7 - Submarine Laid Mines; The TM Mines: The TMC MineChapter 8 - Controlled Mines; The RM Mines
GERMAN UNDERWATERS ORDNANCE MINES
Chapter 8 - CONTROLLED MINES
THE KMB MINES

The KMB is a very simple controlled mine made of wood and concrete. It can be used as a normal controlled mine for firing by observation, as a magnetically monitored mine using the M 1 unit for night control, or as a combination of the two. It was designed early in 1944 to be used against landing craft and to be controlled from an observation point on shore.

Characteristics of the mine are as follow:

Height

31 in.

Diameter

41 in.

Weight of charge

220 or 440 lb. of cast hexanite

Total weight of mine

1,760 or 1,980 lb.

Safety distance

165 to 260 ft.

Maximum effective
depth

100 ft.

Minimum effective
depth

Unlimited

Method of laying

By crane from deck of surface vessel with no way on

Figure 108 – KMB Mine

Chapter 7 - Submarine Laid Mines; The TM Mines: The TMC MineChapter 8 - Controlled Mines; The RM Mines