Capt. Michael Connor, the commanding officer of NAS Jacksonville, said during a news conference that those on board were a mix of civilian and military personnel, and that while some were staying in the area, others planned to fly on to other parts of the country.
"I think it is a miracle," Connor said. "We could be talking about a different story this evening."
Several pets were on the plane as well, and their status wasn't immediately clear. A navy statement early Saturday offering "hearts and prayers" to their owners said safety issues prevented rescuers from immediately retrieving the animals.
It wasn't immediately clear what went wrong. Boeing said in a tweet Friday night that it was investigating: "We are aware of an incident in Jacksonville, Fla., and are gathering information." The Federal Aviation Administration was referring media inquiries to NAS Jacksonville. Air station officials said investigators from the National Transportation Safety Board have been dispatched to determine what happened.
A photo posted by deputies shows a Miami Air International logo on the plane. The company didn't immediately respond to messages from The Associated Press.
Navy security and emergency response personnel were on the scene and monitoring the situation, the Navy release said. Family members who were expecting the arrival of passengers were instructed to stand by.
It wasn't known how long it would take to remove the plane from the river, but Connor said the landing gear appeared to be resting on the river bed, making it unlikely for the aircraft to float away. He said crews began working to contain any jet fuel leaks almost immediately after securing the passengers' safety.
The Jacksonville Fire and Rescue Department posted on Twitter that approximately 90 personnel responded to the scene, adding that the department's special operations team had trained with marine units for a similar incident earlier Friday. Navy security and emergency response personnel also were on the scene, the Navy release said.
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