If someone suffers a heart attack and has ceased breathing, you should __________.

Correct Answer: Option B — immediately start CPR

Cardiopulmonary resuscitation (CPR) must be initiated immediately upon confirming cardiac arrest and cessation of breathing to maintain minimal cerebral and coronary perfusion. Maritime first-aid protocols prioritize chest compressions and rescue breathing until an Automated External Defibrillator (AED) or medical evacuation is available.