[Otto-matic]

https://www.cnn.com/americas/live-ne...-23/index.html

Crews searching for the Titan submersible heard banging sounds every 30 minutes Tuesday, according to an internal government memo update on the search.

Four hours later, after additional sonar devices were deployed, banging was still heard, the memo said. It was unclear when the banging was heard Tuesday or for how long, based on the memo.

A subsequent update sent Tuesday night suggested more sounds were heard, though it was not described as “banging.”