Try breathing to a song in your head.
Emergency medical services (abbreviated to the initialism EMS in some countries) are a type of emergency service dedicated to providing out-of-hospital acute medical care, transport to definitive care, and other medical transport to patients with illnesses and injuries which prevent the patient from transporting themselves.
Emergency medical services may also be locally known as a first aid squad, emergency squad, rescue squad, ambulance, squad ambulance service, ambulance corps, or life squad.
Underwater diving is the practice of going underwater, either with breathing apparatus (scuba diving and surface supplied diving) or by breath-holding (freediving).
Underwater diving methods include Free-diving, Scuba diving, Surface-supplied diving, Saturation diving, and diving in Atmospheric diving suits.
Diving equipment is equipment used by underwater divers to make diving activities possible, easier, safer and/or more comfortable. This may be equipment primarily intended for this purpose, or equipment intended for other purposes which is found to be suitable for diving use.
Equipment which is used for underwater work or other activities which is not directly related to the activity of diving, or which has not been designed or modified specifically for underwater use by divers is excluded. Oxygen
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