Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
26.00 ft
J ?
9.25 ft
P ?
21.75 ft
E ?
8.00 ft
Sail Area Breakdown
Calculated from rigging dimensions. Use these as your starting point when ordering a new suit.
| Sail | Area (ft²) | Area (m²) |
|---|---|---|
| MainsailP × E ÷ 2 | 87.0 | 8.1 |
| 100% ForetriangleI × J ÷ 2 | 120.3 | 11.2 |
| 150% GenoaTypical light-air headsail | 180.4 | 16.8 |
| Storm Jib~50% of foretriangle, high-cut | 60.1 | 5.6 |
| Symmetric SpinnakerEstimated from I, J | 432.9 | 40.2 |
| Total Working Sail AreaMain + 100% foretriangle | 207.3 | 19.3 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Mccurdy & Rhodes design
Performance Ratios
How the Seafarer 23 carries its sail relative to its displacement.
SA/D Ratio
17.9
Moderate — comfortable coastal cruiser, not overcanvassed.
Mast Height (above DWL)
28.9 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
39%
Stiff enough to carry a 150% genoa comfortably into moderate breeze.
Typical Sail Inventory
What Seafarer 23 owners usually carry and what's worth buying used vs. new.
Mainsail 87.0 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 180.4 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~132 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 60.1 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~433 ft²
Popular downwind upgrade — easier than symmetric for shorthanded sailing.
Optional
Replacement Cost Estimator
Get a rough price range for a new mainsail and genoa for the Seafarer 23 — Dacron, laminate, and cruising performance tiers.