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#47
Dive Logging/ Multi level dive logs
Nobel1 - 3/23/2017 12:40 AM
Category: General
Replies: 8

Hello Everyone,

I am an open water diver, i only have around 8 dives logged and i am having trouble logging my dives correctly. My first four dives for the advanced open water were pretty simple dives, went down to around 40 feet max and had no problem logging them. I am now taking the advanced open water courses and I did a deep dive to 100 feet, but I was only there for a minute or two. The problem I am having is when I use the tables to find my pressure group it puts me past the NDL of 20 minutes since the entire dive lasted 25 minutes, my question is, how to I compensate for only being at 100 feet for a minute and find the pressure group that I should be in?
#50313
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Greg - 3/23/2017 6:50 AM
Have you tried using the eRDP-ML? It’s the electronic calculator for multi-level dive planning. Or the old school Wheel RDP, which has been discontinued, but you can find them for sale online.
#5660
Eric_R - 3/23/2017 10:35 AM
It’s either do what Greg is suggesting or use a Dive computer. That’s the great thing about them as they will compensate for you. It’s still important to know you NDL for the depth your diving.
#47
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Nobel1 - 3/23/2017 11:30 PM
I just bought the eRDP-ML and it made it easier, I put 100 feet first for 5 minutes, then i entered 60 feet for around 10 minutes then the last 10 minutes were at 35 feet. That’s basically how that works right?

I do have a Dive computer, I know it tells me everything I need to no about dive time, air pressure, nitrogen and NDL, but it doesnt help me while im logging the dive in the book. I know its probably not really that important, but I would just like to learn how to properly log my dives, mainly pressure groups.
#1963
DiverfromBaskingRidge - 3/24/2017 7:38 AM
Pressure groups are mainly used for tables. Computers do not show you pressure groups - at least two of mine do not. I am not sure that Pressure Groups are important for logging but that is my opinion. Most instructors want to see how many dives and what type of diving you have done. This gives them a better idea of your diving experience and then when they get you in the water they can evaluate your skill level.

There is a way to use the tables to do multilevel diving but it is not condoned by any agencies so it is not worth discussing. I have used it and still use it to plan my dives including gas volume and reserves.

Good luck in your diving.
#4139
BillParker - 3/24/2017 5:50 PM
Trying to plan and document a dive like that manually is no fun. Learn how to use a dive computer. Let the computer keep track of those details.
#47
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Nobel1 - 3/25/2017 12:58 PM
Thank you, that is exactly what I needed to hear, like you said, when an instructor sees that I used a Dive computer then they should know that the computer did all of the work.

Thank You.