For the Rusty departure from 31L, what heading is maintained until cleared by tower?

The correct heading to be maintained for the Rusty departure from runway 31L until cleared by the tower is 305°. This heading is a part of the standard departure procedures established for this specific runway and ensures that aircraft maintain appropriate separation from other traffic in the vicinity of the airport.

When departing, pilots are required to adhere to the prescribed heading until they receive further instructions from the air traffic control tower. This procedure not only helps in maintaining organized traffic flow but also ensures safety during takeoffs, especially when multiple aircraft may be departing simultaneously.

Choosing 305° reflects an understanding of the specific departure route, which is critical for safe navigation in the busy airspace around airports.