Single Cylinder regulator setup

When it comes to single cylinder diving my preferred regulator system is the "underarm primary" or "advanced open water" style reg system.
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Scuba diving has significant risks. The information provided in this video is supplemental educational material and does not offer a complete educational experience for any dive activity. Scuba diving requires in-person training. Specialty and advanced areas of diving require specialty dive training, equipment, and experience. Always check with manufacturer recommendations before using or customizing equipment. Talk to a certified and qualified dive instructor for more information.

[@seanharrison8284]

Another great video with solid logic 👏

[@bloodymarvelous4790]

This is basically a standard setup but you're breathing from your octo and keeping your primary on a necklace in case of an emergency. At 40 inches the longest hose is still short, so you're not putting distance between you and the panicked diver. The only advantages are that you know you're donating a working second stage, and the backup is always in the same place. I get that a 7 ft hose can be a lot to handle for a some people, but that's why there is the 5ft hose option. It's routed the same way, except it tucks under your armpit instead of under a hose retainer or canister on your waist strap, so it doesn't require hose management. It's as streamlined as the option shown here, but it gives you almost 2 feet extra distance when donating. This also means the OOG diver can comfortably swim next to you. This seems to me like a half measure when going to a full measure requires no additional effort and very little additional cost. A 5ft hose is only about $5 more expensive than a 40in hose and all it takes is running it across your chest and around the back of your neck. If you want to have your long hose primary in yellow, you can still do that with a 5ft hose. They're available in yellow as well.

[@quietlife4me]

Purposely running a “yellow” primary or just happened to be the color?

[@BarefootBentley]

It's on purpose and how it comes from the manufacturer. The primary regulator is also the regulator that's donated in this setup, so the yellow faceplate helps indicate that.

[@sixandup939]

What’s the length of the primary hose?

[@BarefootBentley]

40inches