Final answer:
A life jacket must be replaced if it has significant wear or damage, such as rips, broken straps, or diminished buoyancy, lacks clear US Coast Guard approval labels, or shows color fading and mold presence.
Step-by-step explanation:
A life jacket is unacceptable for use and must be replaced if it demonstrates signs of significant wear or damage that could affect its performance. This includes any rips or tears in the fabric, broken buckles or straps, or if the flotation material inside the life jacket has become waterlogged or has diminished buoyancy. Furthermore, a life jacket that is not clearly labeled with the US Coast Guard approval, size, and weight specifications should also be replaced, as this information is vital to ensuring it can perform correctly.
Other signs that a life jacket may no longer be safe and effective include color fading from prolonged sun exposure, which can weaken the fabric, and mold or mildew presence, which can also degrade materials. It's crucial for safety that life jackets are inspected regularly and replaced as needed to ensure they provide the necessary protection on the water.