Wasn't an A-frame also used when washing tanks...when finished with the butterworth? It was like a tripod and used to haul the buckets of muck out of the tanks? My memory fades with timeeeeeeeee! Vix (Night)Thamesphil said:And an A-frame is a lifting device, usually found on diving support and ROV support ships, which is shaped a bit like an 'A'. Its primary role is for lifting ROVs and diving bells etc. over the stern of the ship.