DIR Gear Configuration, Piece by Piece

A DIR gear configuration is a standard way of setting up scuba equipment so that every item sits in the same place, on every diver, on every dive. It uses a backplate and wing, a one-piece harness, a long-hose primary regulator, a bungeed backup and as little else as possible, so you or a teammate can find anything without thinking.

By Jeremiah Gardner · Last reviewed October 15, 2026

Most gear problems underwater aren't failures. They're fumbles: a reg you can't find, a hose you snag, a clip you can't open in gloves. A standard configuration removes the fumbles.

Why standardize your gear at all?

Standardization turns emergencies into routines. If your teammate's backup regulator is always under their chin, you never search for it. If everyone's gas is set up the same way, anyone can help with anyone's problem.

It also scales. The same layout works from a single aluminum tank in warm water to doubles with stage bottles in a cave. Divers learn it once and build on it, rather than relearning a new setup at each step.

The configuration at a glance

Item	Standard placement	Why
Backplate	Rigid plate on your back, steel or aluminum	Stable platform; can replace belt weight
Harness	One continuous piece of 2-inch webbing, one buckle	Simple, consistent fit and attachment points
Wing	Behind you, sized to the rig	Lift where it supports horizontal trim
Primary regulator	7-foot long hose for Gardner training, routed around the neck	The reg you breathe is the one you donate
Backup regulator	Short hose, bungee necklace under the chin	Fixed location; take it with the left hand after donation
Pressure gauge	Short hose, clipped at the left hip	Easy to read, never dangling
Inflator hose	Left side	Matches the wing's inflator
Primary light	Head on a hand mount; canister at right hip when used	Illumination and communication
Backup light	Clipped to a chest D-ring	One for open water, two for overhead dives
Cutting tool	On the waist belt	Reachable with either hand
Stage and deco bottles	Clipped on the left side	Keeps the long hose side clear

The backplate

The backplate is the foundation. It holds the cylinder or doubles tight against your back so the tank can't roll, and it puts some of your ballast high and centered.

Stainless steel plates are heavier. In cold water or a drysuit, a steel plate can replace much of the lead you'd otherwise wear on a belt.
Aluminum plates are lighter. They suit warm water, thin suits and travel.

The plate should sit high enough that you can reach your valves, without the top of the tank hitting the back of your head.

The harness

Gardner's list specifies a single-piece Hogarthian harness with a crotch strap, adjustable chest D-rings and two adjustable D-rings on the left side of the waist belt. Adjust the harness and attachment points to the diver and the configuration.

There are no plastic buckles, no quick releases and no padding to compress. Once fitted, it should remain consistent; reassess the fit when your suit or configuration changes. It should be snug enough to hold the plate in place but loose enough to reach your valves and breathe deeply.

The wing

The wing is the buoyancy cell behind you. Size it to the rig, not to the biggest dive you might ever do. A wing that's too large traps air in corners, is harder to vent and adds drag.

Single-tank wings and doubles wings are different products. One wing rarely does both jobs well.

The regulators

This is the heart of the configuration.

Primary on a long hose. Gardner's equipment list specifies a 7-foot hose. It runs down your right side, under your light canister or into your waist belt, across your chest and around the back of your neck to your mouth. In an out-of-air emergency, you donate the regulator you're breathing. The full routing is in Long Hose Configuration.
Backup on a necklace. Your backup second stage is on a short hose, held just under your chin by a loop of surgical tubing or bungee. When you donate the long hose, take the backup with your left hand and breathe.
Gauge on the left. Your pressure gauge sits on a short hose, clipped to the left hip D-ring.

In backmounted doubles, the long-hose primary and wing inflator are supplied from the right post; the necklace backup and pressure gauge are supplied from the left. Confirm the complete hose routing with your instructor before valve and failure drills.

Lights, tools and storage

Primary light: a focused beam on a hand mount; canister and handheld lights are both listed. A canister sits at the right hip when used. Without it, retain the long hose at the waist belt as taught for the rig.
Backup lights: one small backup light clipped to a chest D-ring in open water, two for overhead diving.
Cutting tool: on the waist belt, reachable with either hand.
Storage: a thigh pocket on a drysuit or a small pocket on the harness for an SMB, spool and wet notes. Nothing clipped where it dangles.
Stage and deco bottles: carried on the left, leaving the donation side clear. With a stage and a deco bottle, the stage is inside and the deco bottle outside. Use aluminum bottles; UTD prohibits steel stage and deco cylinders in certification courses.

Fins, mask and computer

Fins: stiff blade fins with spring straps suit the frog kick and back kick. Split fins struggle with both, and UTD's propulsion training requires non-split fins. See Scuba Finning Techniques.
Mask: fit comes first. Gardner's list includes a backup mask, optional for Essentials of Rec and Open Water/Rec 1 and required for Essentials of Tech and Rec 2/3.
Computer: wrist-mounted, where you can read it while holding position.

What should you bring to Gardner Underwater training?

UTD's general open-circuit minimums and Gardner's equipment list serve different purposes. UTD permits a donatable 5- or 7-foot primary hose and rear-inflation buoyancy equipment; Gardner's list specifies a 7-foot primary and a backplate, harness and appropriate wing for backmount training.

The local list also calls for blade or jet-style fins, a wrist-mounted depth/time device, an analog compass, a cutting device, a backup light, and an SMB pre-rigged on a spool. It lists a 22–24-inch necklace hose and a configuration-specific SPG hose. Match the exposure suit, cylinders and weighting as a balanced system; Gardner's list does not pair steel cylinders with wetsuits.

Some items vary by course. The local Essentials of Rec checklist marks the backup mask and secondary cutting device optional; Essentials of Tech adds a deco bottle and requires both. For Essentials training, plan on a primary light and at least one backup, consistent with UTD's general minimum equipment. UTD also lists a notebook and writing utensil and specifies two backup lights for overhead diving. Confirm the final packing list with your instructor.

Bring the SMB and spool specified for your course. Gardner's course checklists specify 100 feet of line, while the equipment overview lists 125 feet; confirm the packing requirement with your instructor. UTD's 70-foot general minimum is a separate baseline.

Common configuration mistakes

Clipping things "just in case." Every extra item is drag and something to snag. Take it off or put it in a pocket.
Long hose with nothing to hold it at the hip. It loops away from your body. Retain it under the light canister or at the waist belt, with a clear deployment path.
A loose backup necklace. The backup should sit right under your chin, not hang at your chest.
Overweighting to "be safe." A steel plate plus a full belt plus a steel tank is a lot of lead. Do a proper end-of-dive weight check; see How to Master Scuba Buoyancy.
Buying first, training second. Dive a configured rig with an instructor before you buy one.

Learn the configuration in the water

The fastest way to understand a rig is to dive one with someone who can adjust it on you. Our Doubles (Backmount or Sidemount) course covers the normal and emergency skills of double-tank diving. If you're on a single tank, start with Essentials of Recreational Diving.

Frequently asked questions

Can I use a DIR configuration with a single tank?

Yes. A single tank uses the same layout: long hose primary, bungeed backup, gauge on the left and a wing sized for one cylinder.

Is a backplate and wing better than a jacket BCD?

For trim, stability and standardization, most divers find it is. A jacket has advantages at the surface. We compare them in Backplate and Wing vs Jacket BCD.

Do I need a canister light for recreational diving?

No. Gardner lists both canister and handheld primary lights, with a hand mount. Without a canister, retain the long hose at the waist belt. Primary-light requirements and the number of backups depend on the course and the dive.

Can I dive steel doubles in a wetsuit?

Gardner Underwater's equipment list does not pair steel cylinders with wetsuits. UTD's general rule prohibits steel doubles without a balanced exposure system such as a drysuit, with an exception for steel cylinders neutral or positive at 500 psi/35 bar. Steel stage and deco cylinders are prohibited in UTD certification courses.

Is sidemount compatible with DIR?

UTD's system brings sidemount into the same logic, with the same long hose and backup layout. That's covered in our Doubles (Backmount or Sidemount) course.