Wisdom of trusting one's dive computer?

Please register or login

Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

Benefits of registering include

  • Ability to post and comment on topics and discussions.
  • A Free photo gallery to share your dive photos with the world.
  • You can make this box go away

Joining is quick and easy. Log in or Register now!

The OPs got a teric, which supports Gradient factors. He can go super conservative and go 30/70, or bump it up abit.

If it was a Suunto with RGBM, I'd say shitcan the thing and get a shearwater.

Ratio Deco is for lemmings and luddites.
 
Once my computer gives me "bad" information, I would probably end the dive (not continue the planned dive) unless it was super shallow or had redundant information that I trusted.
But how would you know it was bad if you didn’t have an understanding of your dive parameters beforehand?

That’s the whole point GUE is trying to make. You need to know what to expect your computer to say before you look at it. Pay attention to your depth. Pay attention to your NDL times. Understand the relationship between depth and time. What’s your NDL for 70’? 80’? What’s your average depth. Does that depth make sense based on the dive brief or any info you gathered before the dive?

I think it’s silly to put a computer like a Shearwater in gauge mode. But I also think it’s silly to “trust” it and use it as my only source of information.
 
Buhlmann with GF: Google Maps

pseudo RBGM and other proprietary algorithms: Apple Maps

Multi Deco Cut Tables: Handwritten Route Directions

Tables + Bottom Timer: Rand McNally Paper Map + Compass

Ratio Deco: Driving around while refusing to ask for directions because you totes know how to get there brah

You must be a ratio deco expert.
 
What is the better approach? Trusting the computer or doing pre-dive planning?


You plan your dive and use the computer as a guide. Your computer can go to 300ft but can you on the same token if you watch GUI divers profile minute to minute they won't be following their plan. Plan your dive and use your computer to monitor your dive.
 
From the Teric manual:

For OC Rec mode the default conservatism setting is medium (40/85).
For OC Tec and CC/BO modes where some decompression is presumed, the default is a more conservative 30/70.

I've been running in Tec mode, which means I've been running shorter NDLs than it does in rec mode!

What should I set this sucker to?
 
What should I set this sucker to?

Set whatever you want, only you can decide that.

I personally use 75/75 for cold water NDL dives, and 85/85 for warm water NDL dives.

So I currently choose to go 25% below the M value when cold, and only a 15% safety margin when warm.
That is after reading and watching just about everything I could on decompression and NDL diving deco stress.
 
Set whatever you want, only you can decide that.

I personally use 75/75 for cold water NDL dives, and 85/85 for warm water NDL dives.

So I currently choose to go 25% below the M value when cold, and only a 15% safety margin when warm.
That is after reading and watching just about everything I could on decompression and NDL diving deco stress.
Sorry my ignorance, but doesn't the first number of XX/YY only apply if you have a deco obligation?
 
Sorry my ignorance, but doesn't the first number of XX/YY only apply if you have a deco obligation?

Yes.
But you have to set them both regardless, in case you have unplanned/unintentional deco.
I just make them the same, I don't do deco at the moment intentionally or unintentionally
 
So you have unplanned deco (IMHO a bit like running out of gas) and you decide to spin the revolver cylinder again?
 
https://www.shearwater.com/products/perdix-ai/

Back
Top Bottom