Why are butterfly snaps not recommended for attaching stage cylinders?

Butterfly snaps are discouraged for attaching stage cylinders primarily because they can easily open upon contact with lines or cables. This feature increases the risk of entanglement, which can be particularly dangerous in an underwater environment where quick movement and dexterity may be compromised. When a butterfly snap inadvertently opens, it can release the attached stage cylinder or other equipment, leading not only to equipment loss but also to potential hazards for the diver. Ensuring that attachments remain secure and minimizing the chances of accidental release are critical for safe diving practices, which is why alternatives with a more secure locking mechanism are typically recommended.