Abstract: While working in water with limited visibility, Employee #1, an unsupervised, unaccompanied, and untended SCUBA diver, who possessed only entry level recreational diving training, drowned as he was attempting to clear monofilament line from the drive shaft of a fishing vessel. The diver was using an inflatable dry suit, for which he had no training, without a flotation device capable of supporting him face up at the surface. Employee #1 drowned. Because Employee #1 was untended, his absence went unnoticed for about an hour before a search was initiated. The sheriff's office retrieved his body several hours later.