A Halcyon 23 is a type of sailing yacht which was built in England.
Halcyon 23 Wikipedia
The Halcyon 23 was designed by Alan Buchanan in the 1960s. At first, it became known under the name "Crystal". After several changes in the accommodation plan, the vessel was taken into production by Offshore Yachts Ltd. in 1965. It became a popular model which remained in production until 1975. In that year, Offshore Yachts Ltd. was forced to close down its operation, after a fire in their shipyard.
The yacht's hull is constructed out of fibreglass. One could choose between a model with a cast iron bulb or twin keel. The dimensions of the Halcyon 23 are as follows: