Arctic Air provides the aircraft, A109E, and pilots for the Columbia River Bar Pilots. That service has been in operation in one form or another for about 13 yrs and is, as far as I know, the only FAA approved commercial hoisting service in the US.
Cougar Helicopters provides a hoist equipped S92 and S61 in the GoM, but operate that service under their Canadian certificate within a NAFTA exemption.
Last edited by inputshaft; 8th March 2010 at 15:35.
Reason: edited to include the word "commercial"