Help needed analyzing a dive

[Dody]

I think you are displaying a basic misunderstanding here

Please explain. I am not sure I understand this Desat stuff relatively to no fly or no dive.

 

[Dody]

I've only been diving since 1986. I'm still a newbie at heart.

Ah! Ah! Said to someone who got his first course on November 2020.

 

[Blackcrusader]

Ah! Ah! Said to someone who got his first course on November 2020.

Well back in January 1986 when I did my OW there were no forums to join and have discussions. You were really dependent your instructor for your knowledge learning along with course materials. IT is my BSAC club training that sticks with me the most. Deco was normal nothing difficult about it just needed proper dive planning. No computer so you spent almost as much time planning the dive as you did doing the dive. Buddy checks were thorough and not so cursory as I have seen with recreational diving. You will do deco dives soon enough me thinks.

 

[DiveClimbRide]

The software is diverlog+ which allows a transfer from the DC to a smartphone. For me it is not giving enough info.

If you have an account with cloud storage you can view it online in a browser from there you can download it in dl7 format. If you could get hold of that and post it here it would be enormously valuable. Alternatively you could download the dive with subsurface and then post the file here.

 

[Raphus]

I recommend subsurface aswell.
Way easier to read the informations you need.

In my opinion he went into deco and cleared it. But a subsurface file would confirm this.

Also you friend really should understand his DC and never ever go into deco by accident. And then not recognize it.
If he would blow his safety stop(which is optional) he could get bent, if he has unknown deco.

 

[scubadada]

Please explain. I am not sure I understand this Desat stuff relatively to no fly or no dive.

The no dive and desaturation times are simply tools to help divers known when it is safe to fly or ascend to significant elevation. The 24 hour no fly time is very conservative. As you know, the recommendation is 12 hours for a single no deco dive and 18 hours for multiday and/or repetitive no deco dives. The no fly time for decompression dives in "longer". The desaturation time is the amount of time until all your compartments are fully desaturated. This is usually less than 24 hours, but may exceed it for multiple days of repetitive dives. On Shearwater computers, you can view the remaining compartment loading by viewing the tissue loading graph.

The no fly and desaturation times are not directly connected to your repetitive dives. There will always be a desaturation time during repetitive dives. The residual nitrogen load is taken into account in your NDL and can be checked ahead of time in your NDL planner. I'm sure you have looked at your NDL planner before a 1st, clean dive, compared to a repetitive dive.

Again, this does raise a question regarding the content of your dive master training program. What would you have replied if one of your divers asked you this very question?

 

[Belzelbub]

The software is diverlog+ which allows a transfer from the DC to a smartphone. For me it is not giving enough info.

For what it’s worth, the image shows how I’m used to seeing a deco ceiling displayed. Colors can vary, but the green cloud at the top of the chart represents the ceiling. You can see the ceiling gets deeper as the time at depth increases, but starts to shrink as I ascend. For the record, this was not actually a deco dive. I just manipulated the GF in Subsurface to an extremely conservative GF just to show how the ceiling would look in Subsurface.

 

[Blackcrusader]

What has happened?

A thread for you to read through Dody

Overshooting NDL and mandatory deco stops

 

[Celt]

If you dive to NDL your in deco. An accidental rapid assent is omitted deco.

 

[Dody]

If you have an account with cloud storage you can view it online in a browser from there you can download it in dl7 format. If you could get hold of that and post it here it would be enormously valuable. Alternatively you could download the dive with subsurface and then post the file here.

I can do that but I don't have the DC. Won't meet my friend before the week-end.