Published: Aug 19, 2010 3:11 PM EDT
Updated: Aug 19, 2010 12:11 PM EDT

STUART, Fla. (AP) - A Florida judge has ruled that a doctor violated navigational rules during a 2009 boating accident that severed a scuba diver's legs.

Martin County Judge Kathleen Roberts sentenced Dr. Robert Nicosia Wednesday to six months probation on a misdemeanor charge.

Robert Murphy of Palm Beach Gardens was struck by Nicosia's boat propellers while diving in January 2009 about 4 miles north of the St. Lucie Inlet.

Murphy testified that he tried to get Nicosia's attention by waving a spear gun above the surface, but no one acknowledged his signal. He said he tried to swim out of the way of Nicosia's boat, but its propeller struck his tank and legs.

Another nearby boat pulled Murphy from the water.