Sea Pearl 21
| Development | |
|---|---|
| Designer | Ron Johnson | 
| Location | United States | 
| Year | 1982 | 
| No. built | 415 | 
| Builder(s) | Marine Concepts | 
| Role | Day sailer | 
| Name | Sea Pearl 21 | 
| Boat | |
| Displacement | 600 lb (272 kg) | 
| Draft | 2.50 ft (0.76 m) with centerboard down | 
| Hull | |
| Type | monohull | 
| Construction | fiberglass | 
| LOA | 21.00 ft (6.40 m) | 
| LWL | 19.00 ft (5.79 m) | 
| Beam | 5.50 ft (1.68 m) | 
| Engine type | outboard motor | 
| Hull appendages | |
| Keel/board type | centerboard or leeboards | 
| Ballast | 360 lb (163 kg) of water (optional) | 
| Rudder(s) | transom-mounted rudder | 
| Rig | |
| Rig type | ketch | 
| Sails | |
| Sailplan | cat rigged ketch | 
| Total sail area | 136.00 sq ft (12.635 m2) | 
The Sea Pearl 21 is an American trailerable sailboat or sailing dinghy, that was designed by Ron Johnson as a daysailer and first built in 1982.
The Sea Pearl 21 is a development of, or at least inspired by, the 1929 Herreshoff Carpenter design by L. Francis Herreshoff.