North Sonar SF680
- 680area, cm²
- 790span, mm
- 9.20aspect ratio
- Midaspect · AR 8.5 – 9.5
Family Sonar SF (Surf Series) Brand’s category Surf / carve Disciplines prone, wing, downwind, pump, wake carbon pre-preg · 2026
The Sonar SF runs 6 sizes, 530–1,230 cm², and changes proportion as it grows: aspect ratio runs 7.1 at one end of the range to 10.6 at the other, so its sizes differ in shape as well as in area.
Its 790 mm span is typical for the area: the median across the 102 current wings within 10% of its size is 780 mm.
Closest wings from other brands
Projected and flat area run 3–8% apart. A marked area is one whose brand does not state which it publishes, so a comparison inside the area tolerance may be comparing unlike figures.
| Brand | Wing | Area cm² | Δ area | Aspect ratio | Δ AR | Span mm | Band |
|---|---|---|---|---|---|---|---|
| Duotone | Crest D/LAB 675 | 675 | -0.7% | 9.30 | +1.1% | 790 | Mid aspect |
| AFS | Pure Fuselink Foil (monobloc front wing + fuselage) 700 | 700 | +2.9% | 9.60 | +4.3% | 820 | High aspect |
| Cabrinha | Fusion H-Series MkII H700 | 700 | +2.9% | 9.49 | +3.2% | 815 | Mid aspect |
| GONG | Ypra Slalom V3 Atmo S | 700 | +2.9% | 8.90 | -3.3% | 790 | Mid aspect |
| F-One | EAGLE HM Carbon 690 | 690 | +1.5% | 9.70 | +5.4% | 820 | High aspect |
| KT Foiling | Nomad 700 | 700 | +2.9% | 8.70 | -5.4% | 780 | Mid aspect |
| Levitaz | Front Wing FS 680 | 680 | +0.0% | 8.70 | -5.4% | 770 | Mid aspect |
| Takoon | Flash Front Wing 680 | 680 | +0.0% | 9.80 | +6.5% | 815 | High aspect |
| AFS | Silk V2 Front Wing 650 | 650 | -4.4% | 9.00 | -2.2% | 765 | Mid aspect |
| GONG | Fluid V3 Atmo XS (Team / Carbon HM) | 710 | +4.4% | 8.70 | -5.4% | 780 | Mid aspect |
| GONG | Ypra Race V3 670 cm² | 670 | -1.5% | 9.90 | +7.6% | 820 | High aspect |
Specifications
| Family | Sonar SF (Surf Series) |
|---|---|
| Size | SF680 |
| Area, cm² | 680 |
| Area basis | unknown |
| Span, mm | 790 |
| Chord, mm | — |
| Aspect ratio | 9.20 |
| Band | Mid aspect |
| Brand’s category | 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.
Data current to August 2026. Every figure above is the manufacturer's published claim, converted to comparable units.