PRCS fatalities (1 Entrant; 1 Would-be-Rescuer) in dredging vessel’s ballast tank (Oxygen Deficiency)

On May 19, 2021, a supervisor entered a dredging vessel’s ballast tank for an inspection. The supervisor entered the tank without any appropriate Personal Protective Equipment (PPE) and did not check if the confined space was safe. Shortly after entering, he collapsed and passed out. After some time, another worker entered the tank in an...