What is "retraction" ?

Retraction is the name for the functionality of raising or lowering the foils up and down into the water.

The C-8 has four different modes:

Harbor mode (A). Apply when moored and ashore. The entire foil system is retracted above the waterline. Algae growth on the foil system can seriously affect craft efficiency and range.

Shallow mode (B). Apply at low speeds only. The aft foil system is lowered into the water, just above the keel line. The throttle and steering ability are limited in shallow mode.

Planing mode (C). Apply in rough seas and for speeds up to 14kn. Reduced range. The aft foil system is further lowered into the water.

Foiling mode (D). Can be applied for all speeds, but foiling starts at about 17kn. Highest efficiency, longest range. The aft foil system and front foil system are fully extended..