I've been told from someone who use to serve in the navy in the 1970s that the Bofors L/60 fitted on his ship was electrically operated. In case of a lack of electrical power, the L/60 could be operated manually. A couple of years later the L/60 on his ship was replaced by an L/70 which unlike the L/60 was fully manually operated; aiming, elevating and traversing the gun was all done by hand. Curious as to why L/70 naval mounts were not electrically operated? Anyone here ever operated a naval L/70 0r L/60 before? Thank you.