in the Management of Mild or Marginal Decompression Illness in Remote Locations Workshop Proceedings. Diabetes & Diving. Two studies were made on recreational diving by persons with diabetes who showed good general blood glucose control prior to entry to the study. The first followed adults with diabetes who were previously certified to dive and the second studied teenagers with diabetes immediately following their certification training. US Navy Survey. DAN conducted a survey of recreational divers to obtain information about diver demographics, dive experience and diving habits on behalf of the US Navy in early 1998. Live-aboard Doppler. Researchers assessed the effects of age, gender and dive profiles on post-dive vascular bubble presence in volunteer participants during 1988/9 using Doppler monitoring devices. Aging Diver Study. Preliminary evaluation of the effects of age and associated medical conditions on dive style and dive outcome using PDE methodology. Breath-Hold Study. The effects of hyperventilation, work, breathing mixture and dive depth on immersed breath-hold duration were investigated to allow an increase in breath-hold time to a maximum safe level without excessive risk of loss of consciousness or functional incapacity due to hypocapnia, hypoxia or hypercapnia. Flying After Diving. DAN conducted human trials from 1993 to 1999 to investigate how long to wait after diving before flying for recreational divers with support from the US Navy. First Aid Oxygen Rebreather. Performance studies made on first- and second-generation closed-circuit oxygen rebreathing circuits developed for remote duty first aid applications confirmed effective performance in the second-generation device. Cialis™/Viagra™ and the Risk of Oxygen Toxicity. A rat model produced positive results of increased risk of oxygen toxicity risk using these drugs. Ongoing programs Flying After Diving Calibration Study. To find out how exercise affects the minimum safe waiting period before flying after diving. Risk/Benefit of PFO Closure. To find out if divers with PFO who underwent the closure procedure are better off than divers with PFO who continue diving without the closure. Sudafed and Risk of Oxygen Toxicity. This study uses an animal model to find out whether Sudafed increases the risk of oxygen toxicity. Extreme Diving Field Study. To analyse aspects of safety including decompression safety, physical fitness requirements and cardiovascular effects of extreme diving. Incidents and Accidents in Compressed Air Diving. DAN compiles case reports of diving incidents, injuries and fatalities in air, nitrox and mixed-gas diving and includes data from these reports in the DAN Annual