Gepanzerte Pioniermaschine GPM AEV

Gepanzerte Pioniermaschine (GPM) was the design for two prototype armored engineer vehicles for the Bundeswehr.

At the end of the 1960s, it was determined hitherto the forward troops demanded a better answer than the Pionierpanzer 2 currently in use, and in 1972, research began on the development of an improved successor. The firms Eisenwerke Kaiserslautern (EWK, now Santa Barbara Systems, a division of General Dynamics) and Maschinenbau Kiel (MAK) were each commissioned to build prototypes.
MAK's Gepanzerte Pioniermaschine prototype being transported.
MAK's Gepanzerte Pioniermaschine on field trials, January 1977.

Hull, running gear, and drivetrain were derived from the Bergepanzer 2A1.

GPM 1 MAK (Maschinenbau Kiel)

Frame-arm line dredge in a rotating citadel (resembling a turret)
Range of motion 360
Arrangements for the vehicle commander, dredging operator, and driver
Amidships on the left and right sides are folding 3.75m diameter scissor spades to hold the vehicle stationary and prevent it moving when deployed
Digging performance: about 300 m (10,600 ft)/h
Trenching depth of the digging shovel: about 5 m (15 ft)
35 ton capacity winch
Gradient crossing assisted by digging shovel: about 70%
Operator and vehicle commander in turret
Weight 55 tons maximum