WEmergency ascentWEmergency ascent
WDiver communications
WDiver rescue
WDiver training
WRecreational diver training
WDiving supervisorWDiving team
WDoing It Right (scuba diving)
WEar clearingWEmergency ascent
WFitness to dive
WHelium analyzer
WInternational Marine Contractors Association
WNitrogen narcosis
WSurface-supplied diving