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SAFETAC is the system to use when approaching a casualty/some casualties or when something (bad) happens.

Effective use of the SAFETAC approach will reduce the risks to rescuers and, therefore, improve the outcomes for casualties.

It aims to ensure that rescuer safety is preserved, that casualties are kept safe, that immediately life threatening problems are quickly recognised and addressed and that those casualties who require assitance most urgently are treated first.

Shout/send/signal for help (6 whistle blasts or torch flashes repeated at minute intervals)
Assess the scene (for hazards)
Free scene from hazards (this should include donning gloves and other available PPE) and find casualties
Evaluate casualty as you approach - a very brief assessment carried out while approaching: is the airway noisy? is chest moving (and if so is rate normal?) is there blood spurting from wound (i.e. arterial bleeding)?
Triage if more than one casualty (see triage sieve)
Assess and resuscitate ABCDE - this is the primary survey. If there is massive external haemorrhage this should be arrested before airway is assessed/treated
Communications - with the people you have called for help. Let them know early what support you will need (use ETHANE or CHALET mnemonic when calling emergency services)