

product code: 85004.21007
Features
- Sonar AF72 or AF85 Mast
- GeoLock tapered geometry locking system
- Easy recovery from surface breaching
- Sonar Foil Board Adaptor
- Industry-standard 165x90mm bolt pattern
- Fuselage 600mm
- Modular foil system
- Front Wing sold separately
- Foil to board mounting hardware supplied with North Foil Boards
AF72cm or AF85cm Mast, S01 Stabilizer with Cover, 600mm Fuselage, AF Board Adaptor, Screw Packs A,B,C, Tool Set, Travel Bag.

Sonar AF72 or AF85 Mast
30% stiffer than the AK mast yet only 13% heavier, the AF72 mast is ideal for shallower waters, and prone surf foiling. The AF85 mast performs across all disciplines and offers you more ride height to clear waves or to heel over for tighter turns. It is also more forgiving in rougher conditions.GeoLock tapered geometry locking system
Engineered to last, our unique GeoLock tapered geometry locking system provides a more effective load-bearing connection between the Mast and Fuselage, locking them together, so they feel like one piece.Easy recovery from surface breaching
In perfect harmony with any Front Wing, our dihedral-shaped carbon pre-preg rear Stabilizer provides control and riding comfort, allowing fast pivoting turns and easy surface breach-recovery.
Sonar AF Foil Board Adaptor
New Board Adaptor for the AF72 and AF85 masts. FE-Analysis allows us to optimise the structure, increase strength in the areas of highest stress concentration and reduce unecessary weight in lower stress areas.
Industry-standard 165x90mm bolt pattern
The Sonar Foil System can be mounted to any foil board with a 165x90mm bolt pattern. Foil Board and foil to board attachment screws sold separately
Fuselage 600mm
CNC-machined anodised aeronautical grade 6061-T6 aluminum Fuselage. Hydrodynamically optimised shape for minimum resistance.Modular foil system
Customise your ride with our fully interchangeable foil parts to explore multiple disciplines and riding styles all with one setup.
Supplied with Sonar Travel Bag
Sonar AF72 or AF85 Mast
GeoLock tapered geometry locking system
Screws engage the GeoLock while the load transfer now takes place over the full cross-section of the mast profile, allowing for a more efficient load distribution and longer-lasting connection.
Easy recovery from surface breaching
The Stabilizer's positioning on top of the Fuselage allows for a clean, undisturbed approaching flow. Surface piercing of the Stabilizer is not a problem, as the Front Wing sits deeper in the water and is still fully submerged, giving you that extra time to react and adjust your ride height.
Sonar AF Foil Board Adaptor
The AF Board Adaptor incorporates a strong geometry locking connection for better energy transfer and a more direct feel. (Not compatible with AK Mast Series)
Industry-standard 165x90mm bolt pattern
Fuselage 600mm
The shorter length C600 Fuselage improves pumpability and has a sporty feel with earlier take-offs. Features GeoLock. Fits all Carbon and Aluminium Sonar Masts.
Modular foil system
Supplied with Sonar Travel Bag





SONAR FOIL SYSTEM
