Advantages of the Sidemount Configuration
There are many reasons why we choose to dive predominantly in sidemount. To make things clearer, we list the advantages of the sidemount configuration compared to a single cylinder as well as to doubles with a manifold. At the same time, there are no perfect configurations — only ones that are suitable for the type of dive you are about to do. That is why we also have a page dedicated to the disadvantages of the sidemount configuration.
Sidemount vs. Backmount (single cylinder)#
| Aspect | Sidemount | Backmount (1 cylinder) |
|---|---|---|
| Gas source redundancy | Full gas redundancy (two independent sources) | A single gas source |
| Equipment redundancy | Full regulator redundancy (two first stages and two second stages) | Two second stages but only one first stage |
| Mobility | Increased freedom of movement, clear back | Solid backplate on the back, slightly reduced mobility |
| Pressure on the back | Weight distributed laterally – less pressure on the spine | Weight concentrated on back and shoulders |
| Flexibility when gearing up | Cylinders can be attached/detached in the water | Must be fully geared up at the surface |
| Valve accessibility | Valves are visible and easy to reach | Valves are behind you, harder to check underwater |
| Hydrodynamic profile | Flatter profile, ideal for confined spaces | Taller profile, less efficient in narrow environments |
| Risk of entanglement | Flat profile with valves tucked under the armpits reduces chances of entanglement | Exposed valve can snag on fishing lines, cables, or algae |
| Risk of impact to valves or regulators | Both valves and regulators are protected | Valve and first stage are exposed and easier to hit or damage |
Sidemount vs. Backmount (double cylinders)#
| Aspect | Sidemount | Backmount (doubles) |
|---|---|---|
| Safety | Completely independent sources, full redundancy | Connected sources – a failure can affect both until manually isolated |
| Valve access | Very easy, within the field of view | More difficult – requires mobility and practice |
| Transport and logistics | Cylinders are carried separately – easier on land | The system is heavy and bulky |
| Comfort | Balanced weight distribution | Heavy load on the back, more tiring |
| Underwater profile | Very hydrodynamic, ideal for caves and wrecks | Tall profile, less suitable for tight spaces |
| Configurability | Highly customizable to the diver | Standard configuration, few adjustments (which can also be an advantage) |
| Mounting/Dismounting | Easy to attach and remove in the water | Requires full gearing up at the surface |
| Cylinder availability | Feasible with 2 standard aluminum cylinders available worldwide | Relatively few recreational centers have doubles for rent |
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