North Sonar SF930 SF930 hydrofoil front wing: 930 cm², 900 mm span, aspect ratio 8.80, with its closest equivalents from other brands within ±5% area and ±8% aspect ratio. Figures from North's own published specifications.
Projected and flat area run 3–8% apart. A marked area is one whose brand does not state which it publishes, so a match inside the area tolerance may be comparing unlike figures.
| Brand | Wing | Area cm² | Δ area | Aspect ratio | Δ AR | Span mm | Band |
|---|---|---|---|---|---|---|---|
| Slingshot | One-Lock Glide 925 | 925 | -0.5% | 8.80 | +0.0% | 899 | C3 Mid aspect |
| Duotone | Crest D/LAB 925 | 925 | -0.5% | 8.90 | +1.1% | 900 | C3 Mid aspect |
| GONG | Fluid V3 Atmo M | 910 | -2.2% | 8.70 | -1.1% | 890 | C3 Mid aspect |
| Unifoil | Progression 140 Progression 140 | 903 | -2.9% | 8.90 | +1.1% | 898 | C3 Mid aspect |
| GONG | Ypra Slalom V3 Atmo L | 900 | -3.2% | 8.90 | +1.1% | 880 | C3 Mid aspect |
| AFS | Silk V2 Front Wing Silk 950 | 950 | +2.2% | 9.00 | +2.3% | 925 | C3 Mid aspect |
| KT Foiling | Instinct 920 Instinct 920 | 920 | -1.1% | 8.41 | -4.4% | 880 | C2 Mid-low aspect |
| GONG | Curve H V3 FG M | 920 | -1.1% | 8.40 | -4.5% | 880 | C2 Mid-low aspect |
| GONG | Fluid H V3 FG M | 910 | -2.2% | 8.40 | -4.5% | 870 | C2 Mid-low aspect |
| AFS | Pure Fuselink Foil (monobloc front wing + fuselage) Pure 900 | 900 | -3.2% | 9.20 | +4.5% | 900 | C3 Mid aspect |
| Takoon | Flare Front Wing 950 | 950 | +2.2% | 8.30 | -5.7% | 890 | C2 Mid-low aspect |
| GONG | Ypra Surf Fast V3 Atmo XL | 920 | -1.1% | 8.20 | -6.8% | 870 | C2 Mid-low aspect |
| RRD | Flying Fish Front Wing Y30 900 | 900 | -3.2% | 9.40 | +6.8% | 910 | C3 Mid aspect |
| AFS | Evo Front Wing 950 | 950 | +2.2% | 8.10 | -8.0% | 880 | C2 Mid-low aspect |
| Unifoil | Aggression 150 Aggression 150 | 967 | +4.0% | 8.20 | -6.8% | 890 | C2 Mid-low aspect |
| Code Foils | X Series Front Wing 890X | 890 | -4.3% | 8.20 | -6.8% | 852 | C2 Mid-low aspect |
| ENSIS | FLOW ACE Front Wing 900 | 900 | -3.2% | 9.50 | +8.0% | 925 | C3 Mid aspect |
| Family | Sonar SF (Surf Series) |
|---|---|
| Size | SF930 |
| Area, cm² | 930 |
| Area basis | unknown |
| Span, mm | 900 |
| Chord, mm | — |
| Aspect ratio | 8.80 |
| Band | C3 Mid aspect |
| Brand files it under | Surf / carve |
| Disciplines | prone, wing, downwind, pump, wake |
| Construction | carbon pre-preg |
| Model year | 2026 |
| Source | manufacturer |
The brand's published aspect ratio agrees with its own span and area (span² ÷ area) to within 5%, so the figure is confirmed.
See North on the plot →Data current to August 2026. Fast Bobby is the researcher, never the reviewer: every figure above is the manufacturer's published claim, converted to comparable units, and nothing here is a riding impression.