Standing at the baggage carousel watching everyone else’s bags arrive while yours is missing is a traveler’s worst nightmare. When you’re a scuba diver, lost luggage doesn’t just mean wearing the same t-shirt for three days—it can mean missing out on dives or trusting unfamiliar rental gear for your life support. The secret to stress-free dive travel is simple: never check your most critical equipment. Here is our expert guide on exactly how to pack your scuba carry-on so you can always hit the water with confidence.