470 (dinghy)
Class symbol
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| Designer | André Cornu |
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| Year | 1963 |
| Crew | 2 (single trapeze) |
| Draft | 150 mm (5.9 in) 970 mm (3 ft 2 in) |
| Hull weight | 120 kg (260 lb) |
| LOA | 4,700 mm (15 ft 5 in) |
| LWL | 4,400 mm (14 ft 5 in) |
| Beam | 1,690 mm (5 ft 7 in) |
| Mainsail area | 9.12 m2 (98.2 sq ft) |
| Jib / Genoa area | 3.58 m2 (38.5 sq ft) |
| Spinnaker area | 13 m2 (140 sq ft) |
| D-PN | 86.3 |
| RYA PN | 973 |
| Current Olympic Equipment | |
The 470 (Four-Seventy) is a double-handed monohull planing dinghy with a centreboard, Bermuda rig, and centre sheeting. Equipped with a spinnaker, trapeze and a large sail-area-to-weight ratio, it is designed to plane easily, and good teamwork necessary to sail it well. The name comes from the overall length of the boat in centimetres (i.e., the boat is 4.70 metres long).
The 470 is a popular class with both individuals and sailing schools, offering a good introduction to high-performance boats without being excessively difficult to handle, but it is not a boat designed for beginners. Its smaller sister, the 420, is a stepping stone to the 470.
The 470 is a World Sailing International Class and has been an Olympic class since the 1976 games.
The 470 was designed in 1963 by the Frenchman André Cornu as a modern fibreglass planing dinghy to appeal to sailors of different sizes and ages. This formula succeeded, and the boat spread around the world. In 1969, the class was given international status and it has been an Olympic class since 1976. In 1988, the first Olympic women's sailing event used the 470.
To sail the 470, good physical health is enough; strength is not crucial, while world class 470 sailors spend a large portion of their time on fitness. The competitive crew weight is 110–145 kg, making it ideal for both women and men.
World and Continental Championships are organised every year with separate starts for women and men/mixed teams. There is also a World Championship for juniors and a Master World Championship. The 470 is used in regional championships such as the Asian, Mediterranean, and PanAm Games. Entries are limited in important international races, encouraging more competition by requiring qualifying races in most countries.
In the World Championships more than 30 countries have been represented. There are 65 member nations in the International Class Association and more than 40,000 boats have been built in 20 countries.
The 470 may be raced in a mixed fleet of boats, its performance being adjusted by the Portsmouth Yardstick handicapping scheme. In the RYA-administered scheme, the 470 has a Portsmouth number of 973. In the US Sailing-administered scheme, it has a D-PN of 86.3.
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