What about the other 33 victims?

"Seaman's manslaughter" is kind of like gross negligence. In this case:

Failing to have a night watch or roving patrol;

Failing to conduct sufficient fire drills and crew training;

Failing to provide firefighting instructions or directions to crew members after the fire started;

Failing to use firefighting equipment, including a fire ax and fire extinguisher that were next to him in the wheelhouse, to fight the fire or attempt to rescue trapped passengers;

Failing to perform any lifesaving or firefighting activities whatsoever at the time of the fire, even though he was uninjured;

Failing to use the boat's public address system to warn passengers and crew members about the fire; and

Becoming the first crew member to abandon ship even though 33 passengers and one crew member were still alive and trapped below deck in the vessel's bunkroom and in need of assistance to escape.