Underwater Kinetics Blue Tang Titanium Drop Point YellowSafety mattersdont dive without the Blue Tang Titanium knife. Getting caught in netting or a fishing line is a dangerous and common occurrence. The Blue Tang Titanium is designed with a hook at its base to help you quickly cut through any entanglement. It is sharp, corrosion resistant, and has a locking mechanism on its sheath so it wont fall off underwater or stab you and other entanglements.