Jomar 55 Cutter
Description
The Jomarco 55 Cutter or similar variants like JOMAR 55 STSL KETCH in some databases) is a custom or semi-custom bluewater cruising sailboat based on a Bruce Roberts design (specifically the Bruce Roberts 550 or Spray 55-inspired plans, with some attributions to Sparkman & Stephens influences in owner reports). It was professionally built by Jomarco Boats (or Jomarco Shipyard, a small/custom yard in California, USA) in the 1980s (examples from 1987–1998 noted in listings). The design draws from Roberts' popular plans-based series for amateur/professional construction, emphasizing rugged fiberglass (GRP) hulls for durability, offshore capability, heavy displacement for stability in rough seas, a cutter rig (or ketch in some variants like STSL) for versatile sail handling in heavy weather, center cockpit layout for protection and comfort, and spacious interiors suited to extended voyaging or liveaboard use (often with multiple cabins, large saloon, galley, and ample tankage). It's suited to serious ocean passages, with good load-carrying and seakeeping praised in owner experiences. Production was very low (plans-based/custom; likely a handful of hulls built by Jomarco or owners using the plans, not mass-produced), with surviving examples rare and occasionally listed for sale (e.g., in Australia or US West Coast markets as refitted classics).
Construction Details
| Designer | Bruce Roberts-Goodson |
|---|---|
| Builder | Jomarco Boats (USA) |
| Length | 55.000 ft |
| LOA | 55.000 ft |
| Beam | 15.830 ft |
| Max Draft | 7.500 ft |
| Year Built | 1987 |
The standard boat dimensions
| i | 62.50 ft |
|---|---|
| j | 24.25 ft |
| p | 56.75 ft |
| e | 19 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 62.50 ft | 24.25 ft | 56.75 ft | 19 ft | - | - | - | - |
Sails
Jomar 55 Cutter - MAINSAIL
| Luff | * 56.75 ft - (17297 mm) |
|---|---|
| Foot | * 19 ft - (5791 mm) |
| Leech | * 59.06 ft - (18001 mm) |
| Tack Angle | * 88.02 ° |
| Diagonal | * 59.22 ft - (18050 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | 538.62 ft² |
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Jomar 55 Cutter - JIBSAIL
| Luff | * 53.63 ft - (16346 mm) |
|---|---|
| Foot | * 33.33 ft - (10159 mm) |
| Leech | * 45.05 ft - (13731 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 27.89 ft - (8501 mm) |
| Deck Angle | * 12 ° |
| Area | 747.85 ft² |
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Jomar 55 Cutter - GENOA
| Luff | * 63.69 ft - (19413 mm) |
|---|---|
| Foot | * 40.2 ft - (12253 mm) |
| Leech | * 59.09 ft - (18011 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 36.38 ft - (11089 mm) |
| Deck Angle | * 4 ° |
| Area | 1158.27 ft² |
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Jomar 55 Cutter - SPINNAKER
| Stays | * 63.69 ft - (19413 mm) |
|---|---|
| MidGirth | * 43.65 ft - (13305 mm) |
| Foot | * 43.65 ft - (13305 mm) |
| Perc LP | * 180 % |
| Area | 2363.06 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.
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