The easiest way to secure your gear under water is to fix it with clips and bolt snaps. You should make sure you obtain high quality products, because you don’t want to lose your expensive camera gear or other beloved items.
The bolt snaps and clips come in various forms and sizes. The clips are usually more basic, in case you need an easy fix. There are double end bolt snaps, where you can use both ends as a clip and swivel bolt snaps, where you can fix a piece of gear to one end and use the other end to attach it to your BCD. Make sure they have rounded edges so you don’t hurt yourself or damage your gear.