The Galileo HUD is one of the coolest things I’ve used diving. Having everything you need for your dive, including your depth, NDL, time and gas pressure without having to look at your wrist is amazing, especially when you’re concentrating on a photo, watching or helping your buddy or even doing a gas switch on a technical dive. The compass works really well too, displaying the bearing, but also a scrolling indicator, which has north marked red. I found this really helpful on a dive site at the Poor Knights that I had never dived before - we found our way right back to the boat thanks to it! The air intervention is excellent for keeping an eye on your gas pressure.
The interface is easy too, it’s a rotary button that you turn and press, with an easy to navigate interface. All in all the HUD is easy to use, and makes diving much easier, especially navigation.
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These are actually amazing. They come in their own small zipper bag which you open and empty but the you turn the badge inside out and it is inside the mesh bag and you can put your phone etc in it and zip it up. Totally worth it