Spool
Definition
A spool is a compact reel used in diving for deploying DSMBs, marking routes, or conducting searches.
More on Spool
Spools are small, simple reels without handles. Divers use them to deploy DSMBs, lay guide lines, or conduct circular search patterns. They are often made of Delrin or aluminum and feature holes for easy grip. They’re favored for their minimalism and ease of use, particularly in sidemount and cave diving. Spools should be stored properly and practiced with, as poor technique can lead to line tangles or accidental deployment.
Frequently Asked Questions
Spools are smaller and simpler, with no handle or ratchet. Reels offer more control for long lines.
Typical spools hold 30 to 50 feet (10–15 meters), enough for DSMB deployment or short navigation.
Use it to deploy a DSMB, conduct searches, or lay a reference line in confined or open water.
Yes, for jump lines or short passages. Primary lines typically use reels with more control and length.
Practice deployment techniques, maintain tension, and avoid letting the line slack or spool spin uncontrolled.