It is inconceivable that the US Navy Sub would do an emergency dive, then blow ballasts to perform a 'leap' out of the water right underneath a civilian fishing boat. The maneuver was done to impress civilian VIP's who were on the sub AND SOME were even at some of the controls of the ship, or in the way of the ship's crew during the incident.
Many children on the fishing boat died.
Other than doing it underneath a fishing boat, all of this is quite conceivable. Every boat has to do an EMBT blow once a year plus after major maintenance to components in that system. And VIPs often get thrill rides and are allowed to steer the boat.
Concerning the accident, you can find reports on the internet of what the crew did incorrectly with respect to tracking vessels.
I've been aboard during numerous emergency blows, which do look like the boat is leaping out of the water. It's sort of routine. During one of them, I was asleep in my rack, awoken by the dive alarm. I then slid all the way one direction in the rack, then floated above the mattress briefly. That was the most fun one. For all the others, I was on my feet and not far enough forward in the boat to experience the weightlessness.