Software update 2.55.46 (17th. August 2026)

[Nandodiver]

Keeping both computers on same side of the dive transmitter seems to improve the dropouts and alerts

The issue/bug is why 2 x computers connect to the same transmitter give us different air consumption

Even more weird the log of Nautic S dive dont show up in the suunto app/Mac, even after new pairing

[hhouter]

@Nandodiver For the SAC Calculation Suunto uses a very complex formula which includes a Compressibility / Temperature factor. See here: https://www.suunto.com/Support/Product-support/suunto_nautic/suunto_nautic/wireless-tank-pressure-support-/gas-consumption/. So it might be different from a calculations which does not take these variables into account.

I agree it is strange that the Nautic S and Nautic have different outcomes of SAC by using the same Tank / POD.

This weekend I will take my EON Core with me and do the same. I will report back…

[ccrhenrik]

How do you switch setpoint from low to high and vice versa? No shortcut och quick commando?

Why is there only two setpoints? No alternative or bailout setpoints.

[Migsey]

@hhouter Can one pod broadcast info to more than one computer at any given time?

[hhouter]

@Migsey Yes, the POD transmits a signal that is individually picked up by each computer which registered the POD and is within 1.5 m. I have done multiple dives with one POD and my 2 Computers Nautic and EON Core.

[Migsey]

@hhouter Excellent!

Shame I just sold my EON Core!

Today, during the first dive I did with the brand-new software, the SAC rate was nowhere to be seen — just dashes on the computer display and no data in the iOS app.

The POD was definitely sending data, as I could see the cylinder pressure being displayed correctly.

Looking through the documentation, I think I’ve found a way of downgrading to the previous software version, where at least everything related to diving was working reasonably well!

[hhouter]

@Migsey That is strange… you didn’t get the SAC Rate in the dive log? And you did see the tank pressure declining as SAC is calculated in the Nautic and doesn’t have anything to do with the POD other then tank pressure. I will dive tomorrow with both and implemented the SAC / consumption switch window… I will report back…

[Nandodiver]

@Migsey nothing to due with new firmware or old firmware.

I had no SAC calculation twice in old firmware versions (NAUTIC)
In latest firmware FW 2.55.46 happened on the first dive and in the following dives everything is normal… (NAUTIC)

[erik.eddn]

Hi,

Since my Nautic doesn’t run very smoothly—quite the opposite, actually :/—I always carry my EON Steel Black with me as well. The SAC deviation is significantly lower for me—I think that’s probably due to the variables used in the calculation and the time range covered—for example, yesterday:

10L, 41min, ~6.3m avg
Nautic (latest firmware): 18.9 l/min (start/end pressure 195 bar / 81 bar)
EON: 19.2 l/min (start/end pressure 195 bar / 79 bar)

Both are on the same tank pod, with the Nautic on the opposite side from the transmitter and the EON on the transmitter side/arm. For me, at least, it seems to be working as it “should”.

Of course, my own calculation differs from this (but that could just be due to the formula used—more detailed information would be helpful, of course):

Nautic: ((195 - 81) × 10) / (41 × 1.63) = ~17.1 L/min
EON: ((195 - 79) × 10) / (41 × 1.63) = ~17.4 l/min

[hhouter]

@erik.eddn you forget to take additional variables into account: Temperature and Pressure (Compressibility). See formula used by the Nautic here: https://www.suunto.com/Support/Product-support/suunto_nautic/suunto_nautic/wireless-tank-pressure-support-/gas-consumption/