Opa-Locka tower, IAP
Requesting and receiving instructions from tower for practing approaches
When you are established on final approach course, ATC will request for you to change frequency for control tower. When calling control tower, identify yourself, state the name of the approach you are flying and intentions after the approach.
245CG: "Opa-Locka tower, 245CG, ILS 9L for low approach and then back to Miami. "