One really fascinating aspect of sonar that leads to risks/collisions like this, is that there are ‘blind spots’ in the ocean. Because sound waves pass differen

One really fascinating aspect of sonar that leads to risks/collisions like this, is that there are ‘blind spots’ in the ocean. Because sound waves pass differently through water of different temperature and salinity and both of those change on gradients in the ocean, there are mathematical solutions to where a sub would be totally undetectable given a ship’s position and radar frequency. Because these locations are obviously useful for subs, two+ can sometimes end up in the same warm pocket, which obviously increases collision chances from a naive hundred-cubed-km search space https://m.youtube.com/watch?v=AqqaYs7LjlM https://m.youtube.com/watch?v=AqqaYs7LjlM