Based on the latest information available, the boat ramp named Memorial Highway North Yarmouth is located in Maine and has a latitude of 43.85576248 and a longitude of -70.21947479. It is a public boat launch facility that provides access to Casco Bay, which is a large body of saltwater that extends from Cape Elizabeth to Phippsburg.

The boat ramp is relatively wide and can accommodate a variety of watercraft, including motorboats, sailboats, kayaks, and canoes. The facility is also equipped with a floating dock that makes it easy to launch and retrieve boats.

In terms of regulations, all boats must comply with Maine state laws and regulations, including registration requirements, safety equipment, and speed limits. Additionally, there may be local ordinances that apply, so it's a good idea to check with the relevant authorities before launching your boat.

Overall, Memorial Highway North Yarmouth boat ramp is a well-maintained facility that provides convenient access to Casco Bay for a variety of water enthusiasts.