Diving Essential: Plastic Waterproof Dive Tables In the thrilling and changeable underwater diving world, reliable tools ensure safety and enhance experience. These plastic waterproof dive tables, made like credit cards, are great for divers and instructors. Their size is smart, slightly smaller than common letter - sized paper. They fit easily in dive bags and are clear to read, useful for surface breaks or pre - dive planning. Choosing plastic is wise. It's tough and waterproof, handling underwater moisture well. Paper gets ruined when wet, but these tables stay intact and keep info clear. Essential no - decompression dive tables are printed on both sides, guiding safe diving. Based on depth and time, they give safe dive times and ascent paths, helping divers plan and avoid decompression sickness. For instructors, they're good teaching aids. The A5 size makes them portable. They fit in bags and can be fixed to gear. During dives, divers can quickly access info, making diving smoother. Underwater, electronic devices may fail, but these tables are stable and reliable, a must for safe and efficient diving.