From The Internet Movie Plane Database
Steven Segal (Casey Ryback)
Tommy Lee Jones (William Stranix)
Gary Busey (Cmdr. Krill)
Erika Eleniak (Jordan Tate)
Colm Meaney (Doumer)
An agrieved former CIA operative hijacks a U.S. battleship intending to steal the nuclear warheads kept on board. However, his plans are disrupted when a former Navy SEAL comes out of retirement.
Used to transport the hijackers on board and as a SEAL assault helicopter. The actual helicopter is operated by Columbia Helicopters Incorporated, with the serial number N192CH.
The F/A-18 is sent to investigate the missing Sea Knight, and later to shoot down the Tomahawks.
Seen through the window of the Sea Knight, the Apache escort is tasked to protect the SEAL landing team. The AH-64 is not operated by the U.S. Navy or Marines, the AH-1 SeaCobra would usually fulfill this role.