Recreational wreck divers often question whether they need to carry pony cylinders, or another redundant gas source when conducting specialist wreck diving activities. Most agencies and instructors will generally recommend the use of redundant air sources to be a prudent measure for wreck divers. However, the use of redundant air sources isn’t a mandatory requirement; so how can scuba divers decide for themselves whether they should equip themselves with a pony cylinder<\/a>?<\/p>\n\n\n\n