King Co freqs.
F2 is a repeater on Rattlesnake, output 154.965 WLG68
F3 is a simplex remote base mostly for paging from Squak and it seems to me it used to simulcast from either the courthouse or Harborview. 153.755 KBL995 unless there was a change.
F4 is simplex on the National SAR freq of 155.160 KQ5761
My info is a couple years old, but I am pretty sure it is still valid.
F1 is the VHF part of the King County Mutual Aid Repeater (MARS) repeater that TX I think is 155.19
Long ago, they sometimes called LERN F5 (155.37) but that never really caught on.
WSP became the lead agency for the LERN plan, so others quit licensing on it.
Unless something has changed recently the King County Search and Rescue Association (KCSARA) volunteer groups are assigned unit numbers in the 800 range, and operate via communications agreements with the KSCO SAR unit when on the KC freqs. Most of the groups had their own license on 155.160
820's used to be SPART, 830's ESAR, 840'S 4x4 RESCUE COUNCIL, ETC.