Labels:text | cartoon OCR: SURFACE-PIERCING FOIL The amount of lift produced by a surface-piercing foil depends on how much of the foil is under the water. The deeper STRUT the foil, the more lift it creates. As it moves into the crest of a wave, the hydrofoil becomes more submerged, and rises up. In this way, the boat follows the contours of the crests and troughs of the waves. SURFACE -. PIERCING FOIL
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