Two aircraft are planning on conducting a standard formation flight (aircraft remaining within 1 mile of each other) as follows in the U.S.:
- Maintaining VFR below 10,000 MSL;
- Remaining outside/clear of Class B/C/D airspace;
- The route will be totally within the 30 mile mode-C veil of an airport listed in appendix D to Part 91, for example - Houston or Atlanta; (FAR 91.215)
- FAR 91.111 will be complied with: see below:
§91.111 Operating near other aircraft.
(a) No person may operate an aircraft so close to another aircraft as to create a collision hazard.
(b) No person may operate an aircraft in formation flight except by arrangement with the pilot in command of each aircraft in the formation.
(c) No person may operate an aircraft, carrying passengers for hire, in formation flight.
- No flight plan will be filed;
- No communication with ATC will be established. (takeoff/landing will be at non-towered, uncontrolled airports in Class G airspace);
- Both aircraft will be equipped with a properly certified operable (4096 3/A, w/Mode C) transponder in accordance with FAR 91.215;
Question: Is it legal for only the agreed upon formation leader to have his/her transponder on with the other aircraft's tansponder set to "standby?" Or do both airplanes have to have their transponders on?