Published: Mar 15, 2013 10:21 AM EDT

PANAMA CITY, Fla. (AP) - Authorities in Panama City say the body of a 72-year-old captain was recovered about three miles offshore.
    
The News Herald of Panama City (http://bit.ly/YdsMNi ) reports the U.S. Coast Guard was called Thursday morning to the site where Frank Knowles was last seen.
    
Officials say he went into the water about 2 a.m. Thursday. The Coast Guard and volunteers searched the area for about two hours before finding his body. Rescuers performed CPR, but Knowles was pronounced dead at the Panama City Marina.
    
Coast Guard officials say choppy water conditions and darkness hampered the rescue effort.
    
The medical examiner's office will perform an autopsy to determine the cause of death.
    
___
    
Information from: The (Panama City, Fla.) News Herald, http://www.newsherald.com

(Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)