ROCK 20
Masthead Sloop
• Fin with rudder on skeg
• Built 1968–1975
Dimensions
- LOA
- 23.52 ft
- LWL
- 19.52 ft
- Beam
- 7.38 ft
- Max Draft
- 3.94 ft
- Displacement
- 3,858 lbs
- Ballast
- 1,323 lbs
Performance Ratios
-
Capsize Ratio ⓘ
-
1.88
(offshore safe)
-
SA/D Ratio ⓘ
- 14.1
-
D/L Ratio ⓘ
- 232
- Ballast Ratio ⓘ
-
34.3%
Sail Plan
- Sail Area
- 217 sq ft
- I
- 25.6 ft
- J
- 9.02 ft
- P
- 23.23 ft
- E
- 8.73 ft
Construction
- Hull Type
- Fin with rudder on skeg
- Rig Type
- Masthead Sloop
- Hull Material
- FG
- Ballast Type
- Iron
Production
- First Built
- 1968
- Last Built
- 1975
- Number Built
- 200
Notes: Another version called the ROCK 24 is probably based on the same hull but with a different sail plan.