Time for new computer, displaying compass, depth, and air are important

[Johnoly]

Just curious - why do you need to see your tank pressure on the same screen as depth and bearing?

Everyone dives differently... so there is no wrong gear setups.

I'm a spearo on fast current drift dives with the tax man frequently following me.

If I see a target ahead of me, I always do a quick 1 second look at my computer before taking the shot. If that fish COULD run for a ledge and take time to subdue, I need to know before hand how much gas, how long before deco, and how far away from the boat travel line I am. If it's a stupid hog fish that doesn't move, it's quick work. But if it's an Amber Jack reef donkey that's going wild for 10 minutes & I'm huffing & puffing then it probably isn't worth pulling the trigger late in the dive. I need all that info on one single screen, not scrolling thru 2 or 3 screens. for a 1 second glance to make a decision. I check my computer screen probably 10-12 times on each dive.

If your gear is setup with bent clips, 3 SMB's, 2 computers and a funny hood with ears cut out that works for your diving, then there is nothing wrong with that gear {or that computer screen}. It just works for your type of diving.

{Oceanic ProPlus 2 computer screen user}

 

[tursiops]

just curious why you need to monitor tank pressure at the same frequency as bearing and depth.

You are not required to look at tank pressure just because it is on the screen. You may look at it as often as you'd like. There are other things on the same screen that you don't look at very often either. Do they upset you in the same way?

 

[Mobulai]

Not trying to be confrontational - just curious why you need to monitor tank pressure at the same frequency as bearing and depth

He’s playing nice y’all

Rohan I got another example for you(mot as good as @Johnoly s tho):

I got my dive comp and first BC and reg just before a liveabord in 2020; to break them in I decided to do a couple shore dives the day before we boarded, found an open shop in Hurgadah, and asked if I can join any dive — it was a rescue class

1st dive went alright, 2nd dive on the turnaround, I went from 110bar to 30 bar in 1min, zero on the next (found the issue when I used the transmitter on a hose without a spool)
Anyways fixed it after, and got to be a crash dummy for their class

On the boat, towards the last day me and my buddy were the only one ones that wanted to do the 4th (night) dive of the day

Back then my nav skills were quite (they improved now to “basic”)

We had some fun, did our SS, wanted to head back, and we were not sure which way we came from
We had no compass except the one on my DC

Now it was just anxiety (we could see lights, just don’t know which boat is ours), but I did have lots of comfort seeing both my tank pressure, and the compass at the same time
I think also if I kept reach for my spg I would have completely lost bearing/my buddy would have whacked me from frustration
We eventually made it (no thanks to my nav skills, but my buddy’s) and I had more than enough air in my tank

If it keeps the anxiety/panic away, it’s a damn good reason in my book (as long as you’re not choosing entanglement [discussion about my dual spg/transmitter swivel serup is reserved for another thread/day] or something that wins the Darwin Awards)

 

[happy-diver]

Everyone dives differently... so there is no wrong gear setups.

Is this similar to the one where we are all entitled to an opinion no matter how dumb

Tongue-in-Cheek – Meaning, Origin and Examples

meant ironically or facetiously.

grammarist.com

 

[Greg Doyle]

Just curious - why do you need to see your tank pressure on the same screen as depth and bearing?

I might check my SPG 2 or 3 times a dive, and only to confirm what my guess is, while I use bearing and depth frequently to navigate in local low vis conditions.

Do you often find a need to navigate to a spot while urgently watching tank pressure?

Removing the need to have tank pressure on the same screen opens up many computers that only need a tap of a button to switch between bearing and pressure.

Not trying to be confrontational - just curious why you need to monitor tank pressure at the same frequency as bearing and depth.

Cheers,
Rohan

(Computer/depth on right wrist, analog compass & buoyancy/drysuit management on left. Camera in both hands. TankI pressure clipped off somewhere on my waist)

I just like it that way. Personal preference

 

[David Carron]

Excerpt from Peregrine manual, p34:

Compass Features
• 1° resolution
• ±8° accuracy
• High-speed refresh rate
• User set heading marker with reciprocal
• True North (declination) adjustment
• Tilt compensation ±45°

That seems rather sad; the calculations aren't that hard.

 

[David Carron]

I think such a calculation (mentioned by Rohan) gets really computationally expensive the greater the tilt, my G2 compass goes sluggish on tilt (I have my computer angled on my arm for easy glancing, ~45deg+)

Probably SW said 45 to just cover themselves in a respectful manner — might be able to do it, but it’s not up to (someone’s) performance standard /KPI




Can someone with a SW confirm if the “high refresh rate” applies to >45deg?

I don't have a shearwater, but I have designed and programmed tilt compensation software for use in dive computers. The calculations can be done using a slew of trig and matrix functions (this is the approach typically laid out in the hardware datasheets) which I suppose might become inaccurate or slow and might also accumulate error if coded incorrectly, but they can also be done with a less intuitive but mathematically accurate small number of self normalising vector operations.

Here's how Infineon technologies recommend tilt compensating their compass chips: https://www.infineon.com/dgdl/Infin...N.pdf?fileId=8ac78c8c7cdc391c017d0731b0d05573

Before even getting into that mess, the magnetometer needs to be calibrated which is a genuinely tricksy thing to do. It's not impossible that shearwater have taken a simplified approach which limits their capacity for tilt compensation.

 

[stuartv]

The floating compass (with N and your chosen Mark both displayed) on the rim of the Tern TX and the Teric is the absolute BOMBDIGGITY for navigating with an electronic compass.

The only thing better (to ME) is a NERD. But, as much as I love my NERDs, I would not buy one to use for OC diving. They are CCR-only (for me).

Side note: The reason to have a computer on your right wrist is so that you can monitor your depth while you are using your left hand to control your buoyancy (i.e. manipulate your power inflator/dump).

 

[inquis]

The reason to have a computer on your right wrist is so that you can monitor your depth while you are using your left hand to control your buoyancy (i.e. manipulate your power inflator/dump).

+1. I was used to having a watch on my left arm when I first switched to a computer and put it on the right for that very reason. It didn't take long to get used to having the computer on the right and pressing buttons with my left (which did feel a little weird at first). If you tailor the home screen to your needs, you may not even need to press any buttons.