North Sonar Foil - Build your OwnBuild your own package by selecting a North Sonar Hydrofoil Kit which includes a Base plate, Mast, Fuse and Tail wing (except front wing). Pick a Sonar High Aspect Front, and Accessories to receive a 5% discount. Please note all Sonar wings are compatible with the Sonar Hydrofoil Kit. Feel free to add additional HA Front wing, Rear wing or a carbon fuselage. Discount only applies to a complete package. RRP prices can be seen by searching for the items