MARK MM 23
Description
The Mark MM 23 is a rare, trailerable performance cruiser-racer designed by Dr. John S. Letcher Jr. (a naval architect known for small, efficient sailboat designs and aerodynamic studies) and built by Mark Marine Inc. (Raymond, New Hampshire, USA) starting in 1979. Only a very small number of hulls were ever produced (likely fewer than 10–15, as it was a boutique/low-demand model), featuring a variable-draft fiberglass hull with balsa-cored deck and Airex foam core elements for lightweight strength, a fin keel/centerboard or daggerboard configuration for versatility, and a masthead sloop rig optimized for balanced performance and comfort in coastal or lake sailing. It is noted for striking a balance between speed and ease of handling, with a clean, modern hull shape suitable for daysailing or short cruises—though its rarity makes surviving examples collector's items today.
Construction Details
| Designer | Dr. John S. Letcher Jr. |
|---|---|
| Builder | Mark Marine Inc. (USA) |
| Length | 23.000 ft |
| LOA | 23.000 ft |
| LWL | 20.000 ft |
| Beam | 7.920 ft |
| Displacement | 4000 lb |
| Max Draft | 5.080 ft |
| Min Draft | 2.170 ft |
| Year Built | 1979 |
The standard boat dimensions
| i | 27 ft |
|---|---|
| j | 9.30 ft |
| p | 23.35 ft |
| e | 9.25 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 27 ft | 9.30 ft | 23.35 ft | 9.25 ft | - | - | - | - |
Sails
MARK MM 23 - MAINSAIL
| Luff | * 23.35 ft - (7117 mm) |
|---|---|
| Foot | * 9.25 ft - (2819 mm) |
| Leech | * 24.69 ft - (7526 mm) |
| Tack Angle | * 87.98 ° |
| Diagonal | * 24.81 ft - (7562 mm) |
| Head (inches) | * 4 in - (102 mm) |
| Area | 107.86 ft² |
| Edit in Calculator |
MARK MM 23 - JIBSAIL
| Luff | * 22.85 ft - (6965 mm) |
|---|---|
| Foot | * 12.48 ft - (3804 mm) |
| Leech | * 19.6 ft - (5974 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 10.7 ft - (3261 mm) |
| Deck Angle | * 12 ° |
| Area | 122.22 ft² |
| Edit in Calculator |
MARK MM 23 - GENOA
| Luff | * 27.13 ft - (8269 mm) |
|---|---|
| Foot | * 15.16 ft - (4621 mm) |
| Leech | * 25.38 ft - (7736 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 13.95 ft - (4252 mm) |
| Deck Angle | * 4 ° |
| Area | 189.26 ft² |
| Edit in Calculator |
MARK MM 23 - SPINNAKER
| Stays | * 27.13 ft - (8269 mm) |
|---|---|
| MidGirth | * 16.74 ft - (5102 mm) |
| Foot | * 16.74 ft - (5102 mm) |
| Perc LP | * 180 % |
| Area | 386.03 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.
Comments
