In the Swiss Air Force, an aircraft usually isn't deployed permanently to a given Squadron, which is especially true of the [militia] squadrons who are not permanently in service.
Aircraft are used across several squadrons.
Older aircraft will often be retired from front-line service to support squadrons, for example, the Hawker Hunter from a fighter-bomber to a target tug.
Two full-scale Hugo Wolf F/A-18C simulators, tail numbers X-5098 and X-5099, are non-flying training simulators for ground crew and not part of any squadron.
Media related to Aircraft squadrons of the air force of Switzerland at Wikimedia Commons