Both were airlifted to Jersey Shore University Medical Center in Neptune and were still being treated in the trauma unit there late Saturday night, a hospital spokeswoman said. Further details on their injuries were not available.
Sgt. Stephen Jones, a state police spokesman, said Rosko was operating the 155-horsepower vehicle inside Hartshorne Woods Park in Middletown when she lost control while trying to turn it around in a narrow part of the river in Monmouth County.
Jones said it appears that Rosko - who was certified to operate the watercraft - accelerated too quickly and lost control of the steering. It then came out of the water and onto an embankment, ejecting the teens into some low-hanging branches.
The watercraft then continued on for several dozen feet and struck four trees before coming to a stop.
No one else was injured in the accident. Authorities said the watercraft, which was destroyed, was owned by a friend of Rosko's family.
