What should guide the choice of capacity for a redundant delivery system in a wreck dive?

In selecting the capacity for a redundant delivery system during a wreck dive, the type of wreck being explored is a crucial factor. The characteristics of the wreck, such as its size, layout, and potential hazards, significantly influence the diver's requirements for redundant systems. For instance, larger wrecks with complex structures may necessitate a more robust respiratory system to ensure safety in case of an emergency, while a smaller wreck might not require as much redundancy.

Considering the wreck's condition and environment also plays a role. Wrecks may have numerous entrapments, restricted visibility, or even heightened risks of silting, which may demand an enhanced redundant supply to manage these challenges effectively. Therefore, understanding the specific nature of the wreck helps divers assess their equipment needs to ensure a safe and successful dive.