That time of loss and what sounds like TOTAL loss of all contact of any kind including possible emergency beacons is...bad. Real bad. A hull failure would have gone off like a bomb. The tender ship likely didn't have hydrophones recording that would have conclusively picked it up, just sonar and the gertrude.I read several articles on this. It takes about two hours to get down to the wreck, and they lost comms an hour and 45 minutes into the voyage. Whatever happened, happened in deep water. Not looking good for them.
Edit: Ark and I posted at the same time… it is looking to me like RMS Titanic is still claiming victims over 100 years later.