Section 197.320 - Diving ladder and stage(a) Each diving ladder must-(1) Be capable of supporting the weight of at least two divers;(2) Extend 3 feet below the water surface;(4) Be available at the dive location for a diver to enter or exit the water unless a diving stage or bell is provided; and(5) Be- (i) Made of corrosion-resistant material; or(ii) Protected against and maintained free from injurious corrosion.(b) Each diving stage must- (1) Be capable of supporting the weight of at least two divers;(2) Have an open-grating platform;(3) Be available for a diver to enter or exit the water from the dive location and for in-water decompression if the diver is-(i) Wearing a heavy-weight diving outfit; or(ii) Diving outside the no-decompression limits, except when a bell is provided; and(4) Be-(i) Made of corrosion-resistant material; or(ii) Protected against and maintained free from injurious corrosion.