Hi jspilot - I’m just the pupil, and not an advocate per se, but they teach orbiting as part of a standardized plan for arriving at an unfamiliar airport. The message to me is that when arriving at an unfamiliar airport, orbiting above the traffic pattern gives me time to see the runways in use, visualize the traffic pattern, and identify obvious landmarks to turn and descend to the 45. It’s not an absolute requirement, just an initial default. In other words, if I’m visually and mentally prepared to enter the pattern without orbiting, I can most definitely choose to do so.
For a non-towered airport, I usually plan to orbit at 1,000 feet above TPA.
For a towered delta, I plan to orbit above TPA and, if possible, above the delta space so that I can simply
inform tower of my intentions. Sometimes I need to orbit in the tower’s delta space (due e.g. to an overhead Charlie), in which case I
request the orbit.
Class D airspace tend to have have a vertical limit of about 2500 AGL, so an orbit at say 2700 AGL has me above TPA, and above the Class D airspace, but still reasonably close to TPA for my descent to the pattern.
The main problem with towered airports is that tower often wants to help me get down quicker by directing me to do something else, e.g. a straight in, a base entry, etc. As a student, though, I still prefer to fly the full pattern to keep things consistent. I say something like, “Thanks for the base, however, I’d like to orbit and then descend to the [east] for a full 45 entry to
traffic for runway [19].”
I haven’t fully planned my flight to KSBA. It’s a sea-level airport with a TPA of 1000, and the Charlie has a standard ceiling of 4000 MSL, so orbiting above the Charlie would have me really high and probably be pretty unusual. And, orbiting in the Charlie is probably not something that gets requested much.
I’ve landed there before with a friend of mine, so it’s not completely unfamiliar, so ... [still thinking...]
I have never heard anybody request an orbit over my home Charlie (KSNA), so I do get the sense it may be a bit weird. I’ll figure this out soon.