WSP Air 3 and Air 4 are Cessna 206H fixed wing aircraft and were purchased and equipped using money from a Federal Grant.
Air 5-7 are Cessna 182's and as far as I know none of them have FLIR capability (yet).
Air 3 and 4 are used for "routine" daytime traffic patrol and also patrolling Ferry Terminals/Vessels and other areas such as the various Navy facilities in the Puget Sound region.
Air 3 and 4 have also been used to support "special" operations involving other agencies such as local police and sheriff departments.
Something that WSP first started doing earlier this year was nighttime traffic patrols, mainly in Snohomish, King, and Pierce Counties. Several of the Seattle TV stations have video clips from some of these patrols.
Here is a link to an article from 2006 that provides some basic info.
http://seattlepi.nwsource.com/local/271 ... red27.html
Kerwin