This is a float for diving. It can be used for both surface marker buoy (SMB) deployment and safety stops. This compact and lightweight float is perfect for those who don't need a large signal float and want to reduce weight. Even at this size, it's highly visible, making it ideal for divers who travel by train or those who want a diving float for safety without adding much weight to their gear. You can put it in your BCD pocket or attach it with a hook to a D-ring. Having one makes a huge difference in survival chances in an emergency, so if you're unsure, buy this one. Diving Scuba Diving Diving Equipment Signal Float Signal Buoy Safety Stop Float Emergency Float Rescue Float