When would you use tower enroute control (TEC)?

• A. When transitioning from enroute to terminal operations
• B. When an instrument flight is to be done completely within a terminal environment
• C. Only during VFR flights
• D. When weather requires

Answer: (B)

The idea behind Tower En Route Control is to provide ATC service for an instrument flight that stays entirely within the terminal area. When an IFR flight remains inside the terminal environment, the tower can handle the flight for the whole route instead of handing it off to approach or enroute centers. This streamlines sequencing and keeps clearance and separation within the same control facility as long as the flight stays inside the terminal airspace.

So the best choice is that this service is used when an instrument flight is to be done completely within a terminal environment. The other options don’t fit because TEC isn’t about transitioning between enroute and terminal facilities, it isn’t specifically for VFR flights, and it isn’t dictated by weather alone.