Very sad and makes us transatlantic flyers think.
I see everyone talking about a 2 mile range on the CVR pinger , I went back to the Helderberg report and they say 4 mile range underwater and possible to hear via sonar pickup.
They trolled the ocean with a 3-4 mile sonar buoy for 2 months , just in case despite knowing the battery would only last 30 days. Eventually using sidescan they found the wreck.
I would think a submarine dispatched now would find this within a few weeks as their equipment is by far the most sensitive,
South Africa did not have this luxury for the Heldeberg , but still found one recorder and retrieved about 1% of the wreckage at a depth of 4500meters