What is the primary function of a dive knife?

The primary function of a dive knife is as a tool for cutting and digging. Divers often encounter situations where they may need to free themselves from entanglements or cut through lines, fishing nets, or any materials that can pose a hazard underwater. The design of a dive knife typically includes a serrated edge for cutting through tougher materials, as well as a straight edge for more precise cutting tasks. Additionally, dive knives can be used for digging or prying, which can be useful for various underwater tasks.

While other options such as protection against attacks or signaling for help can be secondary uses of a dive knife, they do not represent its primary intended function. Divers should always prioritize the tool’s effectiveness in maintaining safety during a dive by being able to manage potential hazards related to entanglement.