What is the most important thing to tell a responsible person for daytime outing on water?

Wear a life jacket: This is the most important rule for anyone going out on the water, regardless of their swimming ability. A life jacket can keep you afloat if you fall in, and it can also help you stay warm in cold water.

Be aware of the weather: Before you go out on the water, check the weather forecast and make sure it's safe to go out. High winds and waves can make boating conditions dangerous, and lightning is a serious hazard for anyone on the water.

Tell someone where you're going and when you expect to be back: Let a friend or family member know where you're going and when you expect to be back. This way, if you don't return as expected, they can contact the authorities and start a search.

Bring a communication device: Bring a cell phone or other communication device so that you can call for help if necessary.

Don't drink alcohol while boating: Alcohol impairs your judgment and can lead to accidents. It's best to avoid alcohol altogether when you're on the water.

Be careful of swimming: Swimming in open water can be dangerous, even for strong swimmers. There may be currents or hidden obstacles, and you can easily get tired or disoriented.

Always be mindful of your surroundings: Pay attention to other boats, swimmers, and objects in the water. Be especially careful when operating a boat in congested areas.

Take a boating safety course: If you're new to boating, or if you just want to refresh your skills, take a boating safety course. This can help you learn the rules of the road and how to operate a boat safely.

By following these tips, you can help ensure that your daytime outing on the water is safe and enjoyable.