Search found 682 matches

by Ralph
Sunday 15. January 2023, 18:15
Forum: OSTC 4
Topic: No fly waiting time
Replies: 1
Views: 126

Re: No fly waiting time

Hi,

the OSTC2 really calculates a no-fly-time, it is done in the same way as a deco stop calculation, with the only change that the target depth is not surface pressue but an aircraft cabin altitude pressure. The OSTC4 does the traditional 24 hours count-down.

BR
Ralph
by Ralph
Monday 26. December 2022, 15:41
Forum: OSTC3, cR, sport and 2
Topic: Datentransfer und Batteriekapazitität
Replies: 9
Views: 566

Re: Datentransfer und Batteriekapazitität

Zur Ergänzung: das Bluetooth-Modul benötigt 3,3V, wenn eine 1,5 Volt Batterie eingelegt ist, dann muss der DC/DC Wandler zusätzlich zum normalen Strombedarf für Display und CPU auch noch für das Bluetooth-Modul Spannung "hochpumpen" und irgendwann reicht es dann nicht mehr, insb. wenn die ...
by Ralph
Wednesday 7. December 2022, 23:11
Forum: OSTC3, cR, sport and 2
Topic: Gas List PSCR
Replies: 3
Views: 287

Re: Gas List PSCR

Correct, including the 'first' gas.
by Ralph
Sunday 4. December 2022, 09:15
Forum: OSTC3, cR, sport and 2
Topic: Gas List PSCR
Replies: 3
Views: 287

Re: Gas List PSCR

Hello Marv, unfortunately it is not possible to merge the OC (bailout) and loop gases into one "common pool" - that would require tremendous changes to the software. But there is at least a small "helper function" to ease the gas setup: in the Setup Tank menu, there is an option ...
by Ralph
Tuesday 8. November 2022, 19:52
Forum: OSTC3, cR, sport and 2
Topic: where is the Indication of "No fly" ?
Replies: 6
Views: 359

Re: where is the Indication of "No fly" ?

That's normal. "Desat" has a target pressure of 105% of the surface pressure (= 5% overpressure) for every tissue, that's a much lower value than what the tissues will be able to stand at 0.6 bar. This is not to say everyone should board an aircraft right after diving, but this "take ...
by Ralph
Monday 7. November 2022, 21:58
Forum: OSTC3, cR, sport and 2
Topic: where is the Indication of "No fly" ?
Replies: 6
Views: 359

Re: where is the Indication of "No fly" ?

The "no fly" time is calculated like a deco stop, with the current surface pressure as the current "depth" and a pressure of 0.6 bar as the target "surface" pressure. Thus, the "no fly" time is the time one has to "stop" at the current surface pressu...
by Ralph
Thursday 6. October 2022, 14:47
Forum: OSTC3, cR, sport and 2
Topic: unexpected behaviour toggling aGF and back
Replies: 2
Views: 231

Re: unexpected behaviour toggling aGF and back

Hi, the behaviour is as expected / programmed - although it is close to the bug or feature question. Changing the GF settings while in the dive is not covered by Erik Baker's GF concept and doing so poses a question on what to do regarding the GF low reference depth. This depth is not set by hand bu...
by Ralph
Saturday 10. September 2022, 10:10
Forum: OSTC3, cR, sport and 2
Topic: Deco-dive with travel gas, bottom gas and four deco gases
Replies: 10
Views: 738

Re: Deco-dive with travel gas, bottom gas and four deco gases

Hi,

I will have to check the 0 m MOD issue.

All gases will be prompted for, unless they are disabled or set as lost. If they are deco, they will be prompted for once the 1st deco stop is reached on tje ascent.
Anyhow, best is always to try out with the simulator mode.

BR
R.
by Ralph
Wednesday 7. September 2022, 20:28
Forum: OSTC3, cR, sport and 2
Topic: Deco-dive with travel gas, bottom gas and four deco gases
Replies: 10
Views: 738

Re: Deco-dive with travel gas, bottom gas and four deco gases

Hi, you always have to select the gases maually, either via the menu or by acknowleding the gas-switch promt, the computer will never decide on its own that you have done a gas switch without you telling the computer. --> This accounts for the calculation of your deco obligation, leading tissue, sup...
by Ralph
Saturday 3. September 2022, 11:43
Forum: OSTC3, cR, sport and 2
Topic: Deco-dive with travel gas, bottom gas and four deco gases
Replies: 10
Views: 738

Re: Deco-dive with travel gas, bottom gas and four deco gases

Hi, not a direct answer to your questions, but maybe some background information: two calculations run in parallel 1) your actual decompression obligation - this is computed solely from the trajectory of the gasses shown in the lower left of the display. The trajectory will start with the gas tagged...
by Ralph
Monday 15. August 2022, 19:50
Forum: OSTC3, cR, sport and 2
Topic: new dive after reaching surface within 5 min.
Replies: 1
Views: 326

Re: new dive after reaching surface within 5 min.

Hi, you set this time via Menu -> Dive/Deco Setup -> Dive Setup -> Dive Timeout. Range is 1 to 20 mins, default is 5 mins.
by Ralph
Tuesday 9. August 2022, 12:58
Forum: OSTC3, cR, sport and 2
Topic: OSTC sports
Replies: 3
Views: 396

Re: OSTC sports

By downgading to the old firmware - not recommended...
by Ralph
Wednesday 13. July 2022, 21:03
Forum: OSTC3, cR, sport and 2
Topic: Gas density threshold
Replies: 3
Views: 604

Re: Gas density threshold

Hi Michael, thanks for the post and the link to the article! The OSTC also defaults to 5.2 & 6.3 g/l as attention (yellow) & warning (red) threshold. What i was wrong with in my earlier post is that the OSTC only tracks the gas density in CC mode, not in OC. This decision was based on the fa...
by Ralph
Monday 11. July 2022, 15:24
Forum: OSTC 4
Topic: Safety Stop
Replies: 6
Views: 1219

Re: Safety Stop

And it will reset to full time in case you go too deep again!
by Ralph
Monday 13. June 2022, 07:19
Forum: OSTC3, cR, sport and 2
Topic: Gas density threshold
Replies: 3
Views: 604

Re: Gas density threshold

Hi Michel, you are right, the thresholds are independent of the operating mode. They can be changed, but only with external software (but probably that's not supported yet in subsurface / libdivecomputer etc.). Do you have a source on why OC should be more tolerable than CC? I can't really make my m...
by Ralph
Monday 13. June 2022, 07:12
Forum: OSTC3, cR, sport and 2
Topic: elektronischer Kompass
Replies: 2
Views: 631

Re: elektronischer Kompass

Klar kann man das, ist sogar schon realisiert, denn sonst würde die Anzeige noch schneller hin- und herspringen...
by Ralph
Thursday 5. May 2022, 07:33
Forum: OSTC3, cR, sport and 2
Topic: Missing: Altimeter
Replies: 3
Views: 587

Re: Missing: Altimeter

Hi, i actually thought about implementing this, but after a look at wikipedia https://de.wikipedia.org/wiki/Barometrische_H%C3%B6henformel (sorry, german version) it was clear that such an undertaking would consume lots of code space and/or deliver quite unpreceise result due to the various paramete...
by Ralph
Wednesday 4. May 2022, 19:27
Forum: OSTC3, cR, sport and 2
Topic: CCR Modus, Wechsel zwischen Bailout und Loop
Replies: 9
Views: 871

Re: CCR Modus, Wechsel zwischen Bailout und Loop

Hallo Phil, wir haben ein B/O und dann zurück mal nachgestellt, da hat das Logbuch korrekt angezeigt. Wie genau hast du den OSTC auf B/O geschaltet, und wie zurück? Vielleicht gibt es da einen Weg der bei der Datenaufzeichung nicht berücksichtigt ist und deshalb kein Switch-Back-Event ins Log schrei...
by Ralph
Thursday 28. April 2022, 16:02
Forum: OSTC3, cR, sport and 2
Topic: "slow ascent" indication
Replies: 2
Views: 442

Re: "slow ascent" indication

It just means you should ascent slowly as you did a deco dive with mandatoty stops. By no way it implies you did something wrong, it's just a reminder that your tissues are quite loaded and rapid pressure changes should be avoided.
by Ralph
Wednesday 27. April 2022, 20:37
Forum: OSTC3, cR, sport and 2
Topic: CCR Modus, Wechsel zwischen Bailout und Loop
Replies: 9
Views: 871

Re: CCR Modus, Wechsel zwischen Bailout und Loop

Hallo Phil, du machst nichts verkehrt. Allerdings sollte der Tiefen-Plot beim Rück-Wechsel auf den Loop wieder in der Farbe des aktuellen Diluents gezeichnet werden. Warum das nicht passiert fällt mir gerade nicht ein, trotz einer Stunde durchsicht des Codes... Aber das wird sich noch finden! Viele ...
by Ralph
Friday 15. April 2022, 18:54
Forum: OSTC3, cR, sport and 2
Topic: Ceiling on 2nd dive
Replies: 17
Views: 1239

Re: Ceiling on 2nd dive

I don't know how Garmin nor Subsurface handle in detail the end-of-deco detection. My only help i can provide is to suggest to run some dives in the OSTC's build-in simulator and watch the custom view which shows the saturation % (actually it is the supersaturation value of the leading tissue), the ...
by Ralph
Friday 15. April 2022, 13:42
Forum: OSTC3, cR, sport and 2
Topic: Ceiling on 2nd dive
Replies: 17
Views: 1239

Re: Ceiling on 2nd dive

Well, i'm probably at my limits in helping you. I'm not that familir with subsurface, but what puzzles me is 3 things i cannot align: - above you wrote you are doing NDL dives with not stops, - but the OSTC logbook screenshot showes a deco obligation, i.e. it was a deco dive (at least with a GF high...
by Ralph
Thursday 14. April 2022, 17:42
Forum: OSTC3, cR, sport and 2
Topic: Ceiling on 2nd dive
Replies: 17
Views: 1239

Re: Ceiling on 2nd dive

I get to believe that there is some misunderstanding somewhere or with something, but currently i have no clue what it is. What do you mean by "the OSTC shows a longer red bar"? Where / what is that bar? What also puzzles me is "the OSTC still has a 5 min stop at 3 m and the @+5 also ...
by Ralph
Thursday 14. April 2022, 07:35
Forum: OSTC3, cR, sport and 2
Topic: Ceiling on 2nd dive
Replies: 17
Views: 1239

Re: Ceiling on 2nd dive

Well, for me i still don't get the problem. As harv wrote, when the GF high was set to 65%, the re-calculation of the dives delivered 60 to 64%, and when set to 70% re-calc yielded 64 to 68%. That's a pretty good match, as wrote before, and also as the tissue conditions before the 1st dives are trac...
by Ralph
Wednesday 13. April 2022, 19:35
Forum: OSTC3, cR, sport and 2
Topic: Ceiling on 2nd dive
Replies: 17
Views: 1239

Re: Ceiling on 2nd dive

Well then, does subsurface know it's a repetitive dive and account for the residual load from the 1st?