Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
58.14 ft
J ?
18.77 ft
P ?
54.36 ft
E ?
18.47 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 | 502.0 | 46.6 |
| 100% ForetriangleI × J ÷ 2 | 545.6 | 50.7 |
| 150% GenoaTypical light-air headsail | 818.5 | 76.0 |
| Storm Jib~50% of foretriangle, high-cut | 272.8 | 25.3 |
| Symmetric SpinnakerEstimated from I, J | 1,964.3 | 182.5 |
| Total Working Sail AreaMain + 100% foretriangle | 1,047.7 | 97.3 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Finot-Conq & Nauta design
Performance Ratios
How the Oceanis 47 Beneteau carries its sail relative to its displacement.
SA/D Ratio
17.6
Moderate — comfortable coastal cruiser, not overcanvassed.
Mast Height (above DWL)
66.6 ft
Tight on the 65 ft ICW standard — check tide before transiting.
Ballast Ratio
25%
Light ballast — tends to be tender; reef earlier.
Typical Sail Inventory
What Oceanis 47 Beneteau owners usually carry and what's worth buying used vs. new.
Mainsail 502.0 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 818.5 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~600 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 272.8 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,964 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 Oceanis 47 Beneteau — Dacron, laminate, and cruising performance tiers.