The Navy released Lema's name Friday afternoon after his family was contacted.
“He was a good guy” said Middletown Lt. Patrick Sweeney. “He was a steady guy who looked out for the younger guys,” he said.
Lema recently had returned to work after he was injured in a motorcycle accident this summer. Janice, his wife of 48 years, was on the motorcycle with him and died from injuries on June 18.
The couple had five children: Rebecca Souza of Florida, Justin Lema of Cranston, RI, Frank Lema, Jr., Alison Lema and Austin Lema, all of Middletown.
Thursday's incident is under investigation by the Navy.