Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
52.00 ft
J ?
16.90 ft
P ?
45.40 ft
E ?
12.90 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 | 292.8 | 27.2 |
| 100% ForetriangleI × J ÷ 2 | 439.4 | 40.8 |
| 150% GenoaTypical light-air headsail | 659.1 | 61.2 |
| Storm Jib~50% of foretriangle, high-cut | 219.7 | 20.4 |
| Symmetric SpinnakerEstimated from I, J | 1,581.8 | 147.0 |
| Total Working Sail AreaMain + 100% foretriangle | 732.2 | 68.0 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · C&C Design design
Performance Ratios
How the Baltic 39 carries its sail relative to its displacement.
SA/D Ratio
17.1
Moderate — comfortable coastal cruiser, not overcanvassed.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
43%
Stiff enough to carry a 150% genoa comfortably into moderate breeze.
Typical Sail Inventory
What Baltic 39 owners usually carry and what's worth buying used vs. new.
Mainsail 292.8 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 659.1 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~483 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 219.7 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,582 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 Baltic 39 — Dacron, laminate, and cruising performance tiers.