Another warship, the "F262 Erfurt" which is described as a UN warship and also as "DE", is now heading for the area at speed from Cyprus. It may be just coincidence.
The track of the French warship is very very odd - with no obvious "pattern". Maybe it is searching the surface to recover floating debris spotted by helicopters or the Orion rather than an undersea search?
The Hugin Explorer has stopped drifting and is now closing at speed on the area where the French warship is.
I would have thought the military world would be OK revealing quite a lot about their ability to detect a distress "pinger" - particulary if they have had time to go to port and pick up suitable hardware. This is not going to reveal much/anything about their ability to detect ships or subs.