Something that may not be unusual, but that I had never noticed in past starfort visits, was the little knurl at the ends of the iron bands on each gun mount's traverse circle. Makes perfect sense, if a gun is being traversed rapidly through its arc of fire in a heavy exchange, it seems 'twould be only a matter of time before it would inadvertantly roll off its track, crushing some poor powder monkey's lower extremities. Click here to see a closeup of what I'm talking about. The knurl, not the crushed lower monkey extremities.