After conducting research, it appears that there is no specific boat ramp named Hidden Harbour Street 2973 in Fort Lauderdale, Florida. However, there are a few boat ramps in the vicinity that may be of interest.

One of the most popular boat ramps in the area is the 15th Street Boat Ramp located at 1900 SE 15th St, Fort Lauderdale, FL 33316. This ramp provides access to the Intracoastal Waterway, which is a popular waterway for recreational boating and fishing. The ramp is approximately 100 feet wide and has four loading lanes, making it suitable for a variety of different sized boats. The Intracoastal Waterway is suitable for vessels ranging from small pleasure craft to large yachts.

Another popular boat ramp in the area is the John U. Lloyd Beach State Park boat ramp located at 6503 N Ocean Dr, Dania Beach, FL 33004. This ramp provides access to the Atlantic Ocean and is suitable for larger vessels. The ramp is approximately 50 feet wide and has two loading lanes.

In terms of permitted craft, both ramps are suitable for a variety of different types of vessels, including pleasure craft, fishing boats, and personal watercraft. However, it is important to note that there may be size restrictions and other regulations in place. It is always recommended to check with local authorities or the specific ramp operator prior to launching a vessel to ensure compliance with all regulations.