For daylight use only, an acceptable visual distress signal is the orange smoke signal. Orange smoke signals are designed to be visible during the day and are not effective during nighttime or low-light conditions. These signals emit dense orange smoke that stands out against the sky, making them useful for attracting attention and signaling for help in daylight hours.
It's important to note that the use of distress signals, including orange smoke signals, is typically regulated by maritime and boating authorities. Always check and follow local regulations and guidelines when carrying and using distress signals to ensure you are in compliance with safety standards and requirements. Additionally, make sure you are familiar with the proper handling and use of distress signals to ensure their effectiveness in case of an emergency.