This is the longer version of the Hydrofoil footage of the Waverider 550 centre console Hydrofoil.
The submerged hydrofoils are fully retractable, and designed for rough offshore conditions to soften nasty chop & deep ocean swells. The foils provide a softer landing when the boat breaches the crest of waves as the foils touch and break the water before the hull, and so provide hydrodynamic lift before the hull touches the water.
When the foils are down, they draw only 800mm, from the waterline at rest to