Crew: 2 man crew. For racing, ideal weight of sailors should be between 120 and 200kgs.
Dimensions: 5.05 meters in length, 2 meters in width and ±127kg.
Sail Area: 13.6 square meters, 23.2 square meters with spinnaker.
Class: Restricted (hull shape remains the same from year to year)
Characteristics: Fast, fun and exciting two-person, high-performance trapeze sailing dinghy, raced in over 18 countries on 5 continents.
Difficulty Level: Experienced
The genesis of the class began in 1953 with the creation of the 18-foot 'Coronet' dinghy designed by John Westell. This sailboat competed for the two-person performance dinghy classification for the Olympics at the International Yacht Racing Union (IYRU) trials of 1953 held at La Baule, France. In 1954, the Caneton Association of France requested John Westell to make significant changes to the design to suit their needs. This reduced the overall length, weight and sail area to become the 505, so named for its length of 5.05 meters. The class achieved international status with the IYRU in 1955.
The International 505 is a one-design high-performance two-person monohull planing centerboard dinghy, with spinnaker, utilizing a trapeze for the crew. While it is a high-performance boat and demanding in a blow, the 505 is an extraordinarily well-handling craft and is easier to control than many smaller trapeze boats.
The design of the boat's hull shape and sailplan are tightly controlled, while the spars, foils and disposition of the rigging is open. This allows the boats to be set up to the needs of the sailor, rather than controls established by the class association, resulting in a high level of adaptability to sailing styles. There are a number of successful sail/layout combinations. This freedom to rig as you please allows a remarkably wide range of crew weights and configurations to be competitive, even in big regattas. Successful teams come in many combinations, including all-female, all-male, mixed, and child/adult or child/teen. The open aspect of the class fosters a greater degree of seamanship and boat wisdom, as teams learn to understand and become proactive in issues such as proper sheeting-lead position, standing-rigging attachment, secure equipment foundations and all the other aspects of rigging and layout which are so important to the well-rounded and knowledgeable sailor.