yup. I gather from the blue-fin coverage that it locks onto the bottom and then cruises 100 feet above. So that’s why it failed and had to surface the first time - locked on too low and the failsafe kicked in. Not sure what the second problem was but must have been minor since they sent it right back down. I read that the bluefin can only exceed depth twice and it’s done, over, retired, so couldn’t have been anything serious.
The Bluefin was reprogrammed and covered 35 square miles of ocean floor today.
The search is now on.