Multideco... tips and tricks?

[rsingler]

Red X? I'm guessing not the desktop/Mac version as that exits the program...

Yes, I'm sorry. That's peculiar to the App version.

 

[Wibble]

I calculate bailout with the add deco button, so set up the dive profile in ccr, select the gases used then add deco, which then gives you a profile using the oc gases at your chosen GFs and SAC.

You can then reference the volumes required and manipulate them to reflect how much gas you want to carry based on 1.5, 2 times the vol etc.

I use OC legs in the CCR plan for overhead or return to shot planning.

Nice one; didn't realise you could do that.

The "Bailout" option allows you to change the gradient factors, e.g. from 50/80 to 50/90.

 

[_Ralph]

The desktop Mac/PC versions are quite different user interfaces.

Which version do you have?

For CCR diving, there's some quirks in Multideco, especially with bailout planning. It does come up with the right answers, but some of the extra info (gas consumption) can be a bit odd. Similarly keep an eye on the start point of bailout gasses (e.g. define 80% as 10m).

I quite like it and trust it for diving.

I guess one of the limitations of planning is where you've planned for a 60m/200' dive, but have spent a large time on the deck of the wreck 15m above. That's where the planning's just a worst-case guide; it's the dive computers which you use to run the deco.

Mac version


_R

 

[Martijn]

The biggest tip is, enter all the gases you can imagine. Enter all the dive plans you can imagine. Then use the check box to enable them, click the red X (which won't yet delete them) and click Edit (instead of Delete) to match up with your actual plans.

That's MD's biggest advantage over Subsurface. In Subsurface you can only delete a gas or a segment when you want to compare variations. Then, you have to go back and reenter them if you want to return to your original plan. Unless there's a Subsurface trick I'm unaware of...

There is a trick! The last column lets you toggle gasses. Not segments of the dive though, but already super helpful

 

[rsingler]

There is a trick! The last column lets you toggle gasses. Not segments of the dive though, but already super helpful

View attachment 668835

Thank you!

 

[MultiDeco]

I calculate bailout with the add deco button, so set up the dive profile in ccr, select the gases used then add deco, which then gives you a profile using the oc gases at your chosen GFs and SAC.

You can then reference the volumes required and manipulate them to reflect how much gas you want to carry based on 1.5, 2 times the vol etc.

I use OC legs in the CCR plan for overhead or return to shot planning.

Here are some screenshots of what he is describing above:

Other help with config and planning in MultiDeco is available at: MultiDeco FAQ

 

[hedonist222]

There is a trick! The last column lets you toggle gasses. Not segments of the dive though, but already super helpful

View attachment 668835

nice find!
I would like to treat you to a beverage!

 

[gumbo717]

Found this thread but wanted to ask a question.
When I enter a depth, time, mix, setpoint and calculate the tool runs a 21% mix but decreases the PO2 for the duration of the dive. How do I set the setpoint and it keep it for all levels of the dive?
I have MD from 2020 and the Setpoint stayed at what I set and just dowloaded MD onto my new phone and it is different with the changing SP.
Thanks, any help?

 

[Wibble]

It needs to know the diluent to work out MODs and the like, plus the amount of helium in the mix. With air dil, it means the MOD is the setpoint over mix

MOD = 1.3 / 0.21 = 6.2ATA = 52m / 170ft

The setpoint is the PPO2 at all levels of the dive, thus MultiDeco can work out how much nitrogen is in the mix per depth and calculate the decompression obligation.

Then it prints out the calculated plan.

 

[rjack321]

Found this thread but wanted to ask a question.
When I enter a depth, time, mix, setpoint and calculate the tool runs a 21% mix but decreases the PO2 for the duration of the dive. How do I set the setpoint and it keep it for all levels of the dive?
I have MD from 2020 and the Setpoint stayed at what I set and just dowloaded MD onto my new phone and it is different with the changing SP.
Thanks, any help?

Are you sure you're in CCR mode?

A screen shot of your problem would help