HIGH-SPEED FERRY ROUTE Especially in calm weather and when sailing or anchoring in shallow waters, the waves from high-speed ferries can cause an increased risk of damage or grounding. Smaller vessels should exercise special caution when sailing or anchoring near the routes of high-speed ferries. The inconvenience from the waves of the ferries will decrease on greater water depths. The precautionary measures with regard to these waves should be the same as if sailing in areas with other shipping.