What should you do before using flare on a boat?

Before using a flare on a boat, ensure you are in a safe position and away from flammable materials. Check the expiration date on the flare to confirm it is still effective. Familiarize yourself with the specific type of flare you have, as different types may have different usage guidelines. Lastly, assess the surrounding area to ensure that deploying the flare will not pose a danger to yourself or others nearby.