We have become dependent on our Dive Computers to the point that many divers do not even own a set of Dive Tables anymore. However, the Safe Diver always has a Backup Plan, just in case. Make sure you have a set of Dive Tables in your Save-A-Dive Kit just in case your Computer suffers some 'Technical Difficulties'. These Waterproof Dive Tables have an Easy-to-Follow Flow Chart. The Recreational Dive Planner Table (RDP) is in feet of water (imperial version) and informs the new Diver of Safe Depth and Time Limitations for Recreational Diving. Dive Table is made from Durable Waterproof Plastic and has an Eyelet for attachment of a Lanyard. The RDP is a great item for your Save-A-Dive Kit.