In crafts that have a hydrofoil, a locking mechanism can be used to lock the hydrofoil in place (e.g., in a retracted position or in a deployed position). However, the forces experienced by the hydrofoil, especially when in the deployed position, can cause strain on the locking mechanism, which can lead to jamming or failure. The embodiments presented herein provide a locking mechanism that can be used to avoid this problem. In one embodiment, the locking mechanism uses a pin that is movable along a single axis for engaging/disengaging a portion in a catch that is shaped to receive the pin. In another embodiment, a rear strut of the craft is rotatable, allowing the rear strut to both support the rear hydrofoil and act as a rudder of the craft when in water.