What must stage cylinders for decompression diving be clearly marked with?

Stage cylinders used in decompression diving must be clearly marked with several important pieces of information to ensure safe diving practices. This includes using color codes, which are standard in the diving community to easily identify the type of gas contained within the cylinder and its intended use. For instance, different colors might represent oxygen, helium, or other gases used in various stages of dives.

Additionally, personal identification is crucial. Marking the cylinders with the diver's name helps prevent mix-ups between divers, especially in situations where multiple divers are managing different gear. Having personal identification also plays an important role in emergency situations, as it allows for quick identification of who each tank belongs to.

Moreover, the decompression schedule itself must be displayed on or near the cylinder. This includes depth and time information which is crucial for executing a safe decompression stop during ascent. This information helps divers adhere to predetermined decompression plans, reducing the risk of decompression sickness.

Therefore, having all this information clearly marked—color codes, personal identification, and the decompression schedule—ensures comprehensive communication regarding each cylinder's contents and intended use, promoting safety and organization within the dive team.