Police airlifted a man from an island in Anne Arundel County on Sunday after he was injured while tubing in the Rhode River.
The man hit a wake and was ejected, according to the Anne Arundel County Fire Department.
The injured man was moved to Flat Island by his friends, who called 911 at about 4 p.m., police said.
Anne Arundel County firefighters arrived on the island by boat an determined an air rescue was the safest way to transport the man, who suffered serious but not life-threatening injuries. The man was lifted by hoist from the island by a Maryland State Police helicopter.
The helicopter transported the man to University of Maryland Shock Trauma Center in Baltimore.
No one else was reported injured.
Flat Island is part of the Smithsonian Environmental Research Center in Mayo.