Console vs SPG

[on_two_wheels]

First, let me say I am not a DIR diver, nor plan to be for various reasons. However, the gear configuration makes a LOT of sense to me and, as such, I steered my rig in that direction. I'm not as strict with it as DIR standards (no can light, extra d ring), though.

My question for you guys today is why an SPG? I have a second set of regs with a basic console. It's got an analog depth gauge and pressure gauge. Why wouldn't I want this as my back up to my computer rather than the SPG currently used?

From what I've seen and read there's a reason for everything in DIR so I'm curious to hear why the SPG alone is the common backup. Thanks, in advance.

[mikemill]

First, let me say I am not a DIR diver, nor plan to be for various reasons. However, the gear configuration makes a LOT of sense to me and, as such, I steered my rig in that direction. I'm not as strict with it as DIR standards (no can light, extra d ring), though.

My question for you guys today is why an SPG? I have a second set of regs with a basic console. It's got an analog depth gauge and pressure gauge. Why wouldn't I want this as my back up to my computer rather than the SPG currently used?

From what I've seen and read there's a reason for everything in DIR so I'm curious to hear why the SPG alone is the common backup. Thanks, in advance.

I'm sure others can give better responses but I would think that a console would get in the way when you've got a bunch of bottles clipped off. If the gauge on the wrist goes out then my team mate becomes the backup. Same with a compass (for those consoles with them).

[KMD]

My question for you guys today is why an SPG? I have a second set of regs with a basic console. It's got an analog depth gauge and pressure gauge. Why wouldn't I want this as my back up to my computer rather than the SPG currently used?

From what I've seen and read there's a reason for everything in DIR so I'm curious to hear why the SPG alone is the common backup. Thanks, in advance.

First off, an SPG is not a backup. DIR also doesnt use hoseless air intigrated computers. The SPG clipped to the d-ring on your left waist is the only gauge on your back gas tanks.

Begining with the end in mind, a console doesn't scale. Some various reasons

1) a console is bigger than a basic SPG creating more drag and oportunity to entagle.
2) The left side d-rings will also have other equipment clipped off on them, including bottles and stage leashes. A larger console can interfear with how bottles ride as well as be a PITA to check.
3) You don't need to check pressure all that often while depth, time, & direction are frequently checked. The frequently checked items are put up on the wrists so they can be easily checked while performing some other activity like scotering.

[on_two_wheels]

Got it. Thanks.

[rjack321]

You don't really need a backup analop depth gauge, in addition to the other reasons...
A) Analog is pretty coarse for deco diving/stops
B) Its tough to adjust buoyancy while also monitoring that console
C) Your buddy has a digital depth gauge on his/her wrist anyway

[MonkSeal]

First off, an SPG is not a backup. DIR also doesnt use hoseless air intigrated computers. The SPG clipped to the d-ring on your left waist is the only gauge on your back gas tanks.

Actually, I would say that SPG is backup pressure gauge. The primary pressure gauge is your bottom timer: by tracking your exposure you know how much gas you have - SPG is there just to confirm what you expect to see.