Some divers assume that all guideline devices such as spools and reels are useful only to cave divers. Yet, technical divers understand that guidelines belong on every dive, whether you are exploring a cave, studying the remote recesses of a deep wreck or just enjoying the beauty of any overhead environment. Increasingly, open water divers are learning to use guidelines to mark interesting locations, float a signal marker during a drift dive, or secure alternative lift devices during an ascent.

Halcyon's Defender spools and Pathfinder reels are made to the most rigorous of standards, ensuring that operation is trouble free. These devices are the result of many thousands of hours of recreational, technical, and cave diving and have consistently proven their reliability and superior design in some of the most extreme environments the underwater world has to offer.