Panic. Low air. Cramps. Leaks. If you dive enough, problems —and sometimes emergencies — will eventually arise. But it's up to you as a diver to stick to your training, keep a level head and appropriately resolve the situation. And in almost every scenario, it's important to let your buddy know what you're dealing with. Here are the scuba diving hand signals used to identify emergency situations and help you better communicate with your buddies, both in the video above and GIFs below.