Determine the DEP CON frequency for the TUS3.GBN SID after takeoff from Rwy 11R at Tucson Intl.

The correct frequency for the DEP CON on the TUS3.GBN Standard Instrument Departure (SID) after takeoff from Runway 11R at Tucson International Airport is 125.1 MHz. This frequency is designated for en route air traffic control and departure clearances in this specific area.

In the context of air traffic control, dedicated departure frequencies are assigned to manage aircraft during their initial climb and transition into the en route phase. Using the correct frequency ensures that departing aircraft can effectively communicate with air traffic controllers, receive instructions, and maintain safe separation from other aircraft.

Understanding which frequency to use is crucial for dispatchers, pilots, and air traffic controllers to ensure that all communications are efficient and effective during departures. The frequency of 125.1 MHz is specifically assigned to the Tucson area for departures, helping to streamline the flow of air traffic post-takeoff from Tucson International Airport.