Any owner of a vessel with an onboard toilet is required to install and use a USCG certified marine sanitation device (MSD). Use designated holding tank pumpout stations.
Rinse your boat only with fresh water after each use. This will reduce your need for cleansers and heavy-duty products.
Use old-fashioned cleaning methods, including baking soda, vinegar, lemon juice, borax and "elbow grease".
Take precautions not to overfill your fuel tank. If you overflow onto the boat or dock, wipe up the spill with a rag; do not hose it into the water. If you do spill fuel or oil into the water, do not disperse it with detergent or soap!
If you become grounded, do not attempt to motor your way out. This could cause serious damage not only to your motor and propellers, but also to the water bottom and local marine organisms.
Stow all loose items, plastic bags, drink cans, and other articles properly so they do not blow overboard. Never discard your garbage overboard. Whatever you take aboard, bring back.