Checklists in Rebreather Diving

[Tassi Devil Diver]

CCR splash check a last minute test that EVERYONE must complete before any dive.

 

[Wibble]

CCR splash check a last minute test that EVERYONE must complete before any dive.

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[RedSeaDiver2]

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[Tassi Devil Diver]

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[Wibble]

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Thank you for posting that.

It is indeed the essence of the pre-jump check that we ALL should be doing REGARDLESS of the equipment we're diving.

Obviously on that boat they have crew to help and run the checklists.

 

[Tassi Devil Diver]

We follow this process in my regular group of divers, I got half dozen of these CCR splash check list laminated (example posted early in thread) and keep a copy on my boat, our dive club boat, distributed them to other boats I regularly dive off, have a couple in my dive kit. Get the topside crew to run through last thing with all that are about to dive. Very simple very easy.

 

[LFMarm]

When is a checklist not a checklist?

We all agree that checklists are extremely important for task sequencing. Plenty of examples in the aviation and medical sectors, similarly with rebreathers. Wouldn’t be without them for the build and close phases. Amongst other things, it forces one to do things in the right order and prevents one from skipping critical steps. Furthermore they provide an audit log to compare previous builds and remember settings.

Longer and complex checklists are a no brainer.

What about shorter checklists, with few items. Can a mnemonic do the same aide memoir function as a checklist? This has been used forever in mathematics, "Should old Harry, catch a herring, trawling off America" (sine is opposite over hypotenuse, etc.). Used in other sports such as paragliding "Ha Ha Said The Clown" (helmet, harness, steering toggles, canopy). Used in diving too as in PADI's BWRAF (buoyancy, weights, releases, air, final check). GUE-EDGE too (long forgotten!). This proves that there are alternatives to physical checklists as long as it’s kept simple.

What about other validation techniques, such as counting or chanting. No doubt there’s many a military mnemonic screamed out by recruits — "stick it in, twist it, pull it out".

The point is that there’s many variations on the checklist principle. Long and complex tasks need a written checklist. Sully's famous engine restart following the double engine bird strike, where thankfully he changed the order to start the APU to earlier.

Shorter and less complex tasks suit mnemonics or chants. Such as the pre-jump checks:

Don’t Be Diving Off Poorly Prepared

• Drysuit
• BCD
• Diluent
• Oxygen
• Pressures
• PPO2

Any improvement on that welcome!

Took inspiration from this great mnemonic trick. Here are the lists I will be testing out:

Pre-flight (Get Proper Buoyancy Control Accuracy)​

On the boat

1. Gas. Tanks on, inline shutoff open.
2. Pressure. Verify O2, Diluent and Bailout.
3. Breathing. Prebreathe loop, verify set point, confirm pO2 is stable.
4. Computers. Gases programmed and selected, GFs, pressures AI.
5. Accessories. Fins, mask, gloves.

​

Pre-jump (Don’t Be Diving Off Poorly Prepared)​

Just before jumping

1. Drysuit. Inflate, suit dump open.
2. BCD. Inflate, dump.
3. Dil. MAV push.
4. O2. MAV push.
5. pO2 (computer). Matching low set point+.
6. Pressures (computer). Right gas selected, pressures AI (O2, Dil, BO).

​

 

[LFMarm]

I decided to print these out into PVC cards (same as credit cards). Front for Pre-flight, back for Pre-Jump. Looking forward to see how they turn out.

 

[LFMarm]

Here is v1 of my checklist (front and back). Would love to hear feedback for v2. Are there any checks that you do that are missing here? (I know that some of these things are unit specific but many are valid across).

 

[nadwidny]

Here is v1 of my checklist (front and back). Would love to hear feedback for v2.

View attachment 850644View attachment 850645​

v2.0. You are not flying. You are diving. Calling the check list "Pre-Flight"
is stupid.