According to the latest information available, the boat ramp named F Street 10 is located in Nantucket, Massachusetts. It is a concrete boat ramp that is approximately 25 feet wide and is designed to accommodate small to medium-sized watercraft. The ramp provides direct access to Nantucket Harbor, which is a popular spot for recreational boating, fishing, and water sports.

The F Street 10 boat ramp is open to the public and is accessible year-round, although it may be subject to seasonal closures due to weather conditions. The ramp is operated by the Nantucket Harbormaster's Office, which provides information on water safety and regulations for operating boats in the harbor.

As per the regulations, all kinds of motorized and non-motorized watercraft are permitted on the water, subject to certain restrictions. These may include speed limits, wake restrictions, and designated areas for certain activities such as fishing or water skiing. Users of the F Street 10 boat ramp are advised to check with the Harbormaster's Office for current rules and regulations before launching their craft.

In summary, the F Street 10 boat ramp in Nantucket, Massachusetts, is a concrete ramp that provides public access to Nantucket Harbor for small to medium-sized watercraft. It is operated by the Harbormaster's Office and is subject to regulations for water safety and use.