The American Heart Association released its first major CPR and Emergency Cardiovascular Care update since 2020, with 760 new recommendations — but on a vessel, the standard chain of survival faces a unique challenge: advanced help can be hours away. We break down what changed and what it means for mariners, from updated choking protocols and the case for full CPR with breaths, to why your radio call to the Coast Guard is now a recognized link in the resuscitation chain.