Unfortunately, there appears to be some confusion in the prompt. Hastings-on-Hudson is actually a village in New York, not New Jersey. Additionally, there is no boat ramp located on Warburton Avenue in Hastings-on-Hudson.

However, there is a boat ramp located in Hastings-on-Hudson on River Street, which provides access to the Hudson River. According to the Village of Hastings-on-Hudson website, the boat ramp is 20 feet wide and can accommodate boats up to 22 feet in length. The website also states that the ramp is open to the public and there is no fee to use it.

In terms of permitted watercraft, there are no specific restrictions listed on the website. However, it is worth noting that the Hudson River can be a busy and sometimes dangerous waterway, so it is important for boaters to exercise caution and follow all safety guidelines.

It is important to note that information about the boat ramp may change over time, so it is always a good idea to consult the most up-to-date sources for accurate information.