What initial turn degree is required when cleared by tower after maintaining runway heading?

When cleared by the tower after maintaining runway heading, the initial turn degree required is typically set to 350°. This is because, after taking off, pilots maintain the runway heading to ensure they stay aligned with the flight path that has been cleared by air traffic control. The 350° turn allows the aircraft to begin a standard right turn, typically used in standard instrument departures (SIDs) or departure procedures, which helps to ensure safe separation from other traffic and aligns them with the desired departure route.

Choosing 350° reflects the standard practice of initiating turns after departure and helps pilots to integrate smoothly into the airspace management established by the tower, facilitating a safe transition from departure to en route phases. Each other option would not align with standard procedures as effectively, and they could potentially lead to a less optimal flight path in a crowded airspace environment.