"TAC" is not short for "tactical", it is an acronym for: T - TeachA - AdviseC - Counsel
This is the definition from the ILWG Spring Encampment Site:"...We consider our TACs to be an integral part of the event, and therefore seek out members withthe ability to be both influential and invisible at the same time. The TAC's basic mission: Insure at all times that the cadets are safe. Mentor and advise cadet leaders who need guidance. Act as a front-line counselor for cadets having difficulty with the experience. Provide feedback to the Senior staff regarding the "temperature" of the event. That's the "influential " component. The "invisible " part is more difficult. Just as we hope our cadets excel, sometimes life'smost valuable lessons are learned from failure. Effective TACs understand they are not part of the cadetchain of command, and must walk the fine line between being helpful and letting situations unfold in safebut "less than successful" ways to allow our cadet leaders to gain valuable experience..."