Scenario: I’m working tower at LAX and I have a plane departing my airspace. The only other available frequency is SOCAL Approach; SOCAL Departure is closed.
Question: Is it ok to hand them off to approach or should I just say, “Frequency change approved” and the pilot just tunes out of my frequency?
P.S. This applies to all airfields, not just LAX. I just used LAX as an example.