Carrying Multiple Stage Bottles: Order, Placement and the Leash

One bottle is easy. Two takes some thought.

Three or more, and the question isn't whether you can carry them. It's whether you can find the right one, switch to it, pass it to a teammate and clip it back, without turning your left side into a junk drawer.

Most of that is decided before you get in the water. By where everything goes.

Why does everything go on the left?

Because your right side is spoken for.

Your long hose runs down your right side and is retained at your right hip. When a teammate is out of gas, it has to come free in one movement. A light canister often sits there too. Clip a bottle on the right and you've put something in the way of the most important hose on your rig.

So bottles go left. Every bottle. Every diver. See DIR Gear Configuration for how the rest of the rig fits around them.

Which bottle goes inside?

UTD's convention is simple: stage inside, deco outside.

The stage clips closest to your body. The deco bottle clips outside it, on the same two D-rings: chest and hip.

Is there a deeper reason for that order? Here's the thing. The order matters less than the fact that everyone uses the same one. When your teammate glances at your left side, they already know which bottle is which. When they hand one back, they know where it goes.

Standardization isn't a style choice. It's how a team reads each other at depth.

What order goes on the hip D-ring?

Your left hip D-ring does a lot of work. UTD's order:

1. The bottle.
2. Your pressure gauge.
3. The leash, if you're using one.

Same order, every dive. You'll clip and unclip by feel, and feel only works if nothing moves.

When do you need a leash?

Two slung bottles is the working limit. Any more and your left side gets crowded, your trim suffers and finding the right regulator gets slow.

So extra bottles go on a leash: a short line clipped to your left hip D-ring, carrying no more than three bottles. The bottles ride low and close along your left thigh.

Keep it short. A long leash lets bottles swing, drag and drift away from you. Short enough that the valves rest by the inside of your left thigh, and no more.

Work it in order. A common approach is to breathe from the outermost slung bottle, and as a bottle empties, move it to the leash. The slung bottles stay the ones you're about to use. The leash holds what's done or what's next.

Doesn't more gas mean more margin?

Let's be honest. It's tempting to think so.

The comfortable belief: every bottle I add is more margin.

The truth: every bottle you add is another gas you could breathe at the wrong depth. Another valve that can fail. Another regulator to stow, another clip to snag, another thing your team has to track.

More bottles only add margin if you can manage them. Otherwise they add risk.

That's why gas planning comes first. Scuba Gas Management and the Rule of Thirds decide what you carry. The bottles just carry it.

What should you check before the dive?

• Every bottle on the left, stage inside, deco outside.
• Hip D-ring order: bottle, gauge, leash.
• Each bottle marked with its MOD and your initials. See Deco Bottle Marking.
• Each bottle rigged so it hangs parallel to you. See How to Rig a Stage Bottle.
• Your team knows what you're carrying and in what order you'll use it.

Can your teammate read your left side?

Picture your team at the first gas switch. Could your teammate point to each of your bottles and name the gas? Could they hand one back and know exactly where it clips?

If not, it's not their problem. It's a setup problem.

Bottle handling, gas switching and passing bottles between divers are the heart of the Stage and/or Deco Bottle Extension. Start with one bottle. Get it right. Then add the next.