You'll recall that recently a U.S. sub had a high-speed collision with an uncharted underwater formation, most likely what they refer to as a "seamount". This resulted in the death of one crew and injuries to more. The sub was damaged extensively. These guys rely more on highly accurate charts and experience then any kind of forward looking sonar. For one, you want to stay undetected, and transmitting a signal like that gives you away. Apparently there are other technical reasons why it's tough to do as well.

It's pretty reasonable to say that the SA guys don't have personnel qualified to navigate a sub through unfamiliar waters.

For a high-speed boat you need to look forward far enough distance to be able to react properly to avoid a hit - you not only need to know that something is there you need to know if it is moving and in what direction. Maybe unmanned flying drones flying ahead of the boat transmitting info back...

Many ocean critters rely on their own sonar to navigate, when we blast 'em with ours it can cause confusion on their part or even injury. Maybe we need to figure out the whale song for "look out, we're coming through!" and broadcast that ahead of fast moving objects...

It's pretty impressive that Orange has taken these hits and has not been disabled!