We conducted training for 100 fishermen and 100 seafarers in the form of theoretical teaching combined with on-the-spot practice (hand-held practice) with the content of first aid management when the accident occurredat sea, The results show that: After training, Knowledge and practical skills in emergency cardiac arrest, apnea, management of bleeding wounds, detection and management of fractures, management of gas poisoning, food poisoning, management of burns... Positive changes were statistically significant compared to pre-training (p < 0, 001).