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IRWIN 30 COMPETITION built by Irwin Yachts (USA) and designed by Ted Irwin. Her first hull was built in 1972 with an overall lengh of 9.14 m or 30.00 ft long
| Overall Length (LOA) m / ft | 9.14 m / 30.00 ft |
| Builder(s) | Irwin Yachts |
| Designer(s) | Ted Irwin |
| Brand | Irwin |
| Country | United States |
| Hull Type | Fin with rudder on skeg |
| First Hull Built | 1972 |
| Rigging Type | Masthead Sloop |
| Unsinkable | No |
| Trailerable | No |
| Freshwater Tank Capacity lt/gal | 189 L / 50 gal |
| Ballast Ratio | 46 |
| Overall Length (LOA) | 9.14 m / 30.00 ft |
| Waterline Length (LWL) | 8.21 m / 26.92 ft |
| Beam (width) | 3.10 m / 10.17 ft |
| Draft | 1.62 m / 5.33 ft |
| Light Displacement (MLC) | 4536 kg / 10000 lb |
| Maximum Displacement | 4536 kg / 10000 lb |
| Ballast Weight | 2087 kg / 4600 lb |
| Capsize Screening Formula (CSF) | 1.89 |
| Comfort Ratio | 25.27 |
| Displacement-Length Ratio (DLR) | 228.84 |
| Ballast Ratio | 46 |
| Sail Area to Displacement | 16.39 |
| Estimated Forestay Length | 13.36 m / 43.83 ft |
| Reported Sail Area | 44.04 m² / 474.00 ft² |
| Total Sail Area | 44.03 m² / 473.98 ft² |
| Mainsail Area | 17.88 m² / 192.50 ft² |
| I | 41.70 ft * 12.71 m |
| J | 13.50 ft * 4.11 m |
| P | 35.00 ft * 10.67 m |
| E | 11.00 ft * 3.35 m |
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