The New York Campaign ended in decisive victory for the British and terrible defeat for the Continental Army, which barely escaped destruction. It was completely driven out of New York fro the rest of the war, and the British used it as a base of attack against other targets for years to come.

Correction: It was claimed the Turtle (the words first submersible sea vessel) was unmanned. In fact, it was manned by a pilot named Ezra Lee, who steered it toward its destination then got out of it prior to trying to detonate it.