When operating a motorized vessel within 100 feet of any dock or pier what must you do?

When operating a motorized vessel within 100 feet of any dock or pier, you must reduce your speed to a minimum to avoid creating a wake that could endanger people or property. Additionally, you should be cautious and aware of your surroundings to prevent collisions with other vessels or obstacles. It's also important to adhere to any local regulations that may apply to specific waterways.