Faster than an airplane though.

It will absolutely affect boats in the Pacific.

There probably won't be 10m waves in the middle of the ocean. The waves will only be a few inches tall, but moving FAST. Then they get dramatically taller as they are forced to slow down in shallow water.

The disturbation will be less than 1 meter at open. The actual wave gains altitude only when it hits the shallow waters.

Picture a 1m high wave with a crest to crest wavelength of 100km. That is pretty much what an open water tsunami looks like.

This is why when there's a tsunami warning, boats are supposed to leave the harbor, where it's dangerous, and get to sea where they won't notice the wave.

Yeah, no more than a bit of swell does though. Best example I can find is this -> https://youtu.be/ZS6EmSxncz4?t=78