considering upgrading my wrist computer

[baggins_69]

I currently dive with 2 Pelagic family computers, a Sherwood Vision console AI and an Oceanic Atom 2.0 wireless AI wristwatch.

I am considering upgrading from the Oceanic to the Shearwater Peregrine TX for my wrist computer, and going from my Sherwood being my "comp of record" to being my backup.

a lot of this is due to the larger more readable display and better UI of the Shearwater over the Oceanic, but also bluetooth and wireless charging are attractive.

how close can you get the Shearwater to agree with the Pelagic DSAT algorithm? what do others do to have both a hose mount and wireless computer if the wireless one is a shearwater?

Thanks!

 

[scubadada]

Hi @baggins_69

I have been diving DSAT since 2002, an Oceanic Pro Plus 2 until 2010 and a VT3 since. I have dived a number of second computers. I dived a Dive Rite Nitek Q from 2016-2019 so that I could learn Buhlmann with GF. I have been diving a Shearwater Teric since then. My VT3 and Teric both run off the same Oceanic transmitter on the right HP port. I have an SPG to my left chest D-ring off the left HP port.

DSAT and Buhlmann with a GF high of 95 run similarly, but not identically. I have about 2400 dives on DSAT and about 1250 on Buhlmann. I dive the more conservative of the two when doing no stop diving. I clear one or both of the computers when doing light deco. Both DSAT and a GF high of 95 are liberal/aggressive, as you know from your experience with DSAT. I have become quite fond of my Teric's SurfGF for safety stops and deco stops.

DSAT tends to be a little more liberal on 1st clean dives, especially if deeper. Buhlmann at a GF high of 95 tends to be a bit more liberal on repetitive dives, especially if shallower. I have posted on this topic, including this post illustrating more extreme examples.

Thread 'DSAT vs GF high 95, examples'

Sep 28, 2021

I have written previously about my experience diving DSAT and Buhlmann ZH-L16C with a GF high of 95. I have an example of what I have previously reported. This dive is a first dive of the day on the Castor in Boynton Beach. It was relatively deep with a max depth of 107 feet and an avg depth of 73 feet. DSAT gave me a minimum NDL of 6 minutes. A GF high of 95 on my Teric gave me 1 min of deco at 10 feet. My surfacing GF was 79.

This is a dive later in the week. It is the 4th dive of the day, following 3 moderately deep and long dives. This was a...

• scubadada

Best of luck in your computer decision.

 

[baggins_69]

"My VT3 and Teric both run off the same Oceanic transmitter"

I don't like the idea of a single pressure transducer driving both comps, single point of failure and I like still having a computer if any part of the other computer's chain fails. yes, you have the backup SPG, but if your transmitter is wonky but not broken, you might not realize until you are out of air.

I could just get a second transmitter, and use both wrists and ditch the console, but I like the reliability of the hose mount AI.

 

[Nemrod]

FWIW, I have been running several puck type computers including an Oceanic with my (two) Peregrines and found them to mostly agree, enough that neither get fussy. I am running my Perigrine on the medium setting. But, I now have two Peregrines thus going forward that will likely be my computers and retire the pucks.