Columbia 31 MK II
Description
The Columbia 31 Mk II, designed by naval architect Charles Morgan, was produced by Columbia Yachts from 1965 to 1968, with 97 hulls built. This masthead sloop variant features a refined deck and interior over early models, offering balanced coastal cruising with a centerboard for shallow access and a standard rig for reliable performance— a compact, family-friendly classic that sleeps 4–6 with solid value on the used market.
Construction Details
| Designer | Charles Morgan |
|---|---|
| Builder | Columbia Yachts |
| Length | 30.500 ft |
| LOA | 30.500 ft |
| LWL | 21.500 ft |
| Beam | 9.830 ft |
| Displacement | 8500 lb |
| Ballast | 3400 lb |
| Max Draft | 7.000 ft |
| Min Draft | 2.130 ft |
| Year Built | 1965 |
The standard boat dimensions
| i | 35.90 ft |
|---|---|
| j | 11.82 ft |
| p | 30.80 ft |
| e | 14.67 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 35.90 ft | 11.82 ft | 30.80 ft | 14.67 ft | - | - | - | - |
Sails
Columbia 31 MK II - MAINSAIL
| Luff | * 30.8 ft - (9388 mm) |
|---|---|
| Foot | * 14.67 ft - (4471 mm) |
| Leech | * 33.36 ft - (10168 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 33.65 ft - (10257 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | * 232.6 ft² |
| Edit in Calculator | |
Columbia 31 MK II - JIBSAIL
| Luff | * 30.24 ft - (9217 mm) |
|---|---|
| Foot | * 15.73 ft - (4795 mm) |
| Leech | * 26.13 ft - (7964 mm) |
| Percentage LP | * 114.97 % |
| Length Perpendicular | * 13.59 ft - (4142 mm) |
| Deck Angle | * 12.02 ° |
| Area | * 205.47 ft² |
| Edit in Calculator | |
Columbia 31 MK II - GENOA
| Luff | * 35.91 ft - (10945 mm) |
|---|---|
| Foot | * 19.15 ft - (5837 mm) |
| Leech | * 33.71 ft - (10275 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 17.73 ft - (5404 mm) |
| Deck Angle | * 3.99 ° |
| Area | * 318.33 ft² |
| Edit in Calculator | |
Columbia 31 MK II - GENOA
| Luff | 34.75 ft - (10592 mm) |
|---|---|
| Foot | 17.25 ft - (5258 mm) |
| Leech | 32.5 ft - (9906 mm) |
| Percentage LP | * 135.36 % |
| Length Perpendicular | * 16 ft - (4877 mm) |
| Deck Angle | * 3.76 ° |
| Area | * 277.92 ft² |
| Edit in Calculator | |
Columbia 31 MK II - DRIFTER
| Luff | * 35.91 ft - (10945 mm) |
|---|---|
| Foot | * 19.94 ft - (6078 mm) |
| Leech | * 32.12 ft - (9790 mm) |
| Perc LP | * 150 % |
| Length Perp | * 17.73 ft - (5404 mm) |
| Deck Angle | * 9.01 ° |
| Area | * 318.32 ft² |
| Edit in Calculator | |
Columbia 31 MK II - ASYMMETRICAL
| Luff | * 35.91 ft - (10945 mm) |
|---|---|
| Foot | * 19.5 ft - (5944 mm) |
| Leech | * 33.04 ft - (10071 mm) |
| Perc LP | * 165 % |
| Area | * 525 ft² |
| Edit in Calculator | |
Columbia 31 MK II - SPINNAKER
| Stays | * 35.91 ft - (10945 mm) |
|---|---|
| MidGirth | * 21.28 ft - (6486 mm) |
| Foot | * 21.28 ft - (6486 mm) |
| Perc LP | * 180 % |
| Area | * 650 ft² |
| Edit in Calculator | |
Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.