A correctly fitted lifejacket should not ride up more than what distance?

A correctly fitted lifejacket should not ride up more than a hand-width. This measurement ensures that the lifejacket is snug enough to keep the wearer's body secure and prevent it from slipping off in the event of immersion in water. If the lifejacket rides up significantly during activity, it may not provide the necessary buoyancy and support that it is designed for. Ensuring that it fits within this parameter allows for safe movement while still providing adequate protection. Proper fit is essential for maximizing the effectiveness of the lifejacket, as too much slack may lead to it coming off or failing to keep the person's head above water, thereby increasing the risk of drowning. This guideline is crucial for maintaining safety standards in water activities.