“It had to be squawking to be identified.”
I thought I might not be using the correct terminology but no origin, no destination, and no owner are unusual for a commercial aircraft.
“I thought I might not be using the correct terminology but no origin, no destination, and no owner are unusual for a commercial aircraft.”
Those items are not available to Flightradar via squawk.
This was a charter flight, not a commercial.
It is generally possible to get an exemption prior to take-off for non-fully-functioning transponders, such that a particular flight could still take place.
It is often possible to get an ad hoc variance after the aircraft has already taken off, if the voice-communicating controller has time available to serve the request and its continuation. This could also apply for subsequent handoffs to other controllers if those controllers have time available (and possibly, are so inclined).
Such service and a variance is possible, as above, if the transponder equipment fails while enroute. However, in some (rare or sensitive) cases, it's possible the controller would have the pilot divert and land at an airport that could provide transponder maintenance before the aircraft and pilot could get further clearance.
A generous, controller--with time available--may be able to identify a radar primary (with no info or data block) that has no functioning transponder equipment. Information can be attached to a primary return (as long as there's no disruption to that particularly primary), such that the newly info-associated primary could even be handed off to subsequent controllers. In other words, this could allow an aircraft that has no functioning or only a partially-functioning transponder to be associated with aircraft information that controllers will subsequently be able to use to continue identifying that particular aircraft, all the way to its destination.
In the specific case of FlightRadar24.com, its displays have filters available to its system operators--and to a lesser extent, other users--such that information about certain flights may be hidden in whole or in part, even though all the information that might be available to controllers. This is not infrequently done for military flights.