RedactedNarrative: Operator was participating in a training session in very windy conditions when he was directed to take vessel #2 over to an empty dock area to practice docking on the eastern side of the harbor. Trainer then took the helm and showed step by step how to dock the vessel. The operator then was directed to dock the vessel. The operator put the vessel in forward causing the boat to move ahead quickly and strike vessel #1 causing property damage.