How do you read DCIEM Tables??

[DarkHorse]

A buddy gave me his old NAUI dive tables (NAUI1.jpeg & NAUI2.jpeg) and for the life of me I can't figure out how to read them. I can get as far as getting the No-D limits for a second dive.

Tt looks simple at first;
Table A: Time and depth dive you a "Rep. Group".
Table B: Rep. Group and Surface interval time gives you a Repetitive Factor.
Table C: Repetitive Factor and depth give you the No-D limit at that depth.

WHAT DO YOU DO NEXT???

I've asked people at LDS and on site while diving. No body can figure it out.

I don't *need* to know, I use other tables, but not knowing is driving me insane

Can anyone help?

 

[pete340]

Tt looks simple at first;
Table A: Time and depth dive you a "Rep. Group".
Table B: Rep. Group and Surface interval time gives you a Repetitive Factor.
Table C: Repetitive Factor and depth give you the No-D limit at that depth.

WHAT DO YOU DO NEXT???

I haven't looked at it carefully, but my guess would be that you multiply your bottom time on a dive by the RF for the previous dive, and use that value as the effective bottom time for that dive. So with an RF of 1.1 at 60ft., 40 minutes bottom time becomes 44, which you round up to 50 for your next trip through Table A.

 

[Walter]

First, these don't look like the "old" NAUI tables to me. Actually, they look a great deal like the DCIEM tables to me. I notice there's even a disclaimer from DCIEM on table 1.

 

[DarkHorse]

First, these don't look like the "old" NAUI tables to me. Actually, they look a great deal like the DCIEM tables to me. I notice there's even a disclaimer from DCIEM on table 1.

Thank you for your responce :wtf: . Although telling me I didn't call it by it's corect name doesn't help me read the tables. I will, however, refer to them as DCIEM tables for now on.

Does anyone know how to read the DCIEM dive tables?
(Please ignore the big NAUI name in the top corner of table 1)

 

[gathan]

Table C gives you a no "D" limit for a Repet dive, taking into account residual N2 from the first dive.

If you multiply the repetitive factor obtained from table B, by the actual bottom time of your Repet dive you can then obtain an "Effective Bottom Time" or EBT which you can use to re-enter table A. Hope this helps.

 

[PatH]

A buddy gave me his DCIEM dive tables (NAUI1.jpeg & NAUI2.jpeg) and for the life of me I can't figure out how to read them.

PM me and I can walk you through anything you want to know. Probably easier over the phone or by MSN.

 

[Randy43068]

probably use my eyes..

A buddy gave me his DCIEM dive tables (NAUI1.jpeg & NAUI2.jpeg) and for the life of me I can't figure out how to read them. I can get as far as getting the No-D limits for a second dive.

Tt looks simple at first;
Table A: Time and depth dive you a "Rep. Group".
Table B: Rep. Group and Surface interval time gives you a Repetitive Factor.
Table C: Repetitive Factor and depth give you the No-D limit at that depth.

WHAT DO YOU DO NEXT??? :confused2

I've asked people at LDS and on site while diving. No body can figure it out.

I don't *need* to know, I use other tables, but not knowing is driving me insane

 

[Walter]

Those aren't the DCIEM tables, they just use the same format. Sorry I wasn't clear. I suspect they are the new NAUI tables I've been hearing about, but have never seen. There are many differences between these NAUI tables and the DCIEM tables they resemble.

 

[Charlie99]

Those aren't the DCIEM tables, they just use the same format. Sorry I wasn't clear. I suspect they are the new NAUI tables I've been hearing about, but have never seen. There are many differences between these NAUI tables and the DCIEM tables they resemble.

Yes, they are quite different from the full DCIEM tables; the ones that have a seperate section for each depth increment, but they are identical to the 1995 DCIEM Sports Table, except for replacing a diver logo with the NAUI logo. They also show the 50fpm ascent rate of the 95 tables, as opposed to the 60fpm of the 1990 DCIEM tables.



No relationship to the new NAUI tables.

 

[Walter]

OK, I've have some time to compare the two. They are very similar to the DCIEM tables. These NAUI Tables are less conservative because they have more times/repetitive groups for each depth. For example, at 30 ft, if you stay submerged for 45 minutes, on these NAUI tables your repetitive group would be B, on the DCIEM tables, there is no 45 minutes at 30 ft, so you'd use 60 minutes and your repetitive group would be D. There are some instances where these tables are more conservative than DCIEM, for example 20 minutes at 50 ft would result in a B repetitive group while on the DCIEM tables you'd be an A.

Now, how to use them - there are no instructions, so I'm guessing they are used in the same manner as DCIEM tables. That could be WRONG. Don't plan dives with these tables unless you learn proper proceedures from someone familiar with them. I've never seen them before.

Table A: Time and depth dive you a "Rep. Group".
Table B: Rep. Group and Surface interval time gives you a Repetitive Factor.
Table C: Repetitive Factor and depth give you the No-D limit at that depth.

WHAT DO YOU DO NEXT???

OK, let's walk through some dives.

60 ft for 50 minutes results in repetitive group F (same as DCIEM, BTW).

2 hour surface interval gives you a repetitive factor of 1.4.

Second dive is planned to 50 ft. Our new NDL is 45 minutes.

Theis seems to be where these tables diverge from the DCIEM tables. You finish the dive and that's your last dive. At that point on the DCIEM tables, there's a repetitive group so you can continue diving.