Word for a very nimble boat?

I'm writing a metaphor describing a switch from a very static environment to a very dynamic one.

Instead of trying to turn the Titanic, it'll be like steering a <boat here>

What kind of boat could go into the metaphor?

The best I came up with was "power boat"

Since the OP has clarified that any aquatic craft will be acceptable, my suggestion is

Instead of trying to turn the Titanic, it'll be like steering a Jet Ski.

A Jet Ski is a nimble craft known for being able to change direction very rapidly.

While the term Jet Ski is a brand name owned by Kawasaki, it's used as a generic term for these kinds of personal water craft.