When departing Portland International Airport to the north, which frequency should be used for departure control?

When departing from Portland International Airport to the north, you should use the frequency of 133.0 for departure control. This frequency is specifically designated for departure control at this airport, ensuring that pilots are communicating with the appropriate air traffic control (ATC) facility responsible for managing departures in that airspace.

Using the correct departure frequency is crucial for maintaining situational awareness, receiving timely instructions from ATC, and ensuring safety during the transition from taking off to climbing out of the airport environment. Each airport has specific frequencies assigned for different functions, such as ground control, tower control, and departure control. In the case of Portland International Airport, 133.0 has been designated for this purpose, making it the correct choice for pilots to tune into as they depart to the north.