The Coast Guard says a man was injured aboard a Carnival Cruise ship off the coast of Venice, Louisiana, on Tuesday.
The Huntsville Police Department identified him as one of its officers, John Thomas Holliday.
The department described his injuries as non-life-threatening.
Don Webster, Huntsville Emergency Services spokesman, said both Holliday's father and step-mother work for HEMSI.
The Coast Guard says it received a request at 1:14 a.m. for the medevac of a 23-year-old man with multiple significant injuries after he fell on the ship, Carnival Valor. The man was transported at 5:45 a.m. to New Orleans University Medical Hospital.
According to the Coast Guard, the man arrived in critical condition.