Back in the 1970's, Seattle PD had at least one, and possibly two Hughes 300C's that were equipped with pontoons. I seem to recall one had a malfunction near Foster Island near the west end of the SR 520 floating bridge and had to make an emergency landing on the water. I think it also caught fire. Not sure what happened to the other one. There was a 3rd helo. Air 3, a Bell OH-13G, was involved in a midair collision just north of Boeing Field. Both officers in the helo and 2 persons in a Cessna 150K were killed.
That accident happened on June 21, 1974.
NTSB data shows the helo tail number was N9790,
and that of the Cessna was N562QL.
A Bell 47G with tail number N9790 is listed on the FAA aircraft registry as being owned by a person in Lake Stevens. This helo was formerly owned by Snohomish County. The model is simular but not identical to the Seattle helo.
The Seattle Police Dept
Fallen Officer page has more details.
Officer James St. Delore was the pilot and Officer James M. Forbes was the observer.
Thurston County has/had a Bell UH-1.
That program may have been "mothballed" due to budget issues. Pierce County has/had a fixed wing plane that had been upgraded with FLIR using Federal money, but that program has also had budget issues.
The WSP Air units had used a radio designator of "Smokey" on the Seattle Media CTAF 122.775 for several years, I guess WSP decided to make it official.
Smokey 3 and 4 are Cessna 206's, with FLIR camera
and microwave video downlink capability.
Some of the funds for that came from the Fed's.
In addition to traffic enforcement, those 2 planes are used to support the Navy and other Federal agencies, as well as WSF VATS.
Kerwin