The Onrust was a Dutch ship that was built by Adriaen Block and the crew of the Tyger, which had been destroyed by fire. The ship, a sloop, was the first vessel to be built entirely in America. The construction, with help from the Lenape, took one winter. The ship was 42-feet long and capable of carrying 16-tons.

In 1614, Block sailed through the whirlpools on the East River, and into Long Island Sound. Here he discovered Block Island.

Block was also the first European to venture up the Connecticut River. He managed to get as far as the Enfield rapids, about 60 miles up the river.

Later in the year he sighted another Dutch vessel, and sailed to back to the Netherlands on October 1st of that year.