The RMH MINE. The RMH mine was a ground influence and/or controlled mine. It was started in 1935 and completed shortly thereafter. It was intended to replace influence ground mines in the event of a metal shortage. This mine was used extensively in all German controlled coastal waters, both as an influence mine, and as a controlled mine. It could operate in any of the four ways that the RMA operated.

Figure 114 – RMH Mine – Sectional View

Description of Case

Shape

Cuboidal; supported by a four-wheeled truck

Material

Wood

Length

3 ft. 5 in.

Width

3 ft. 2 in.

Height

3 ft. 10 in.

Charge

2,000 lb. cast hexanite

Description of External Fittings

Cover plate

18-3/4 in. diam., flush type on side of case, secured by 18 screws

Drogue eye

Screwed to center of cover plate; consists of eye bolt, housing and space for soluble plug

Booster cover plate

3-in. diam., aluminum, in center of side of case oppostie cover plate

Hydrostatic clock

6-in. diam., 4 in. from droge eye, secured by keep ring