Navy Dive Tables/SSI Review Question

[rednose83]

Originally Posted by nrembis

If you look at your 40ft row on your table you see the max NDL time is 200 minutes.....but you said this is your 2nd dive and you have 61 minutes of RNT

you have to treat this 2nd dive like you have already been diving for 61 minutes which only leaves you 139 minutes

Okay- I see what's different at 40ft my chart shows the NDL as 130 minutes not 200. So, 130-61= 69 the adjusted NDL.

[rednose83]

Originally Posted by nrembis

200-61=139min adjusted NDL

40 12.2 200 5 15 25 30 40 50 70 80 100 110 130 150 170 200

My numbers are:

40 12.0 130 5 15 25 30 40 50 70 80 100 110 130

Odd. I wonder why the difference.

[it_mike]

Navy dive tables vs. SSI, I expect.

***edit***
Correction, NOAA tables vs. SSI.

[ScubaToys Larry]

download the computerized table tutor off our site, and do a gillion of those types of problems with the answers drawn out for you and explained... in either the navy or ssi tables... (or padi or nitrox or... or...)

Table Tutor reviews and discounts, ScubaToys

(Note: doesn't work on 64 bit operating systems... darn....)

[nrembis]

Originally Posted by it_mike

Navy dive tables vs. SSI, I expect.

***edit***
Correction, NOAA tables vs. SSI.

US Navy Dive tables 3 & 4

the noaa tables are the same and so are my NASDS tables from the late 80's when I started diving.


the table tutor program larry mentions works great, I downloaded it about a week ago or so to play around with, it's awsome.

[nrembis]

How did your academic portion go rednose? Get it all figured out?

[rednose83]

Originally Posted by nrembis

How did your academic portion go rednose? Get it all figured out?

Yup. SSI charts are more conservative. Using my chart (SSI), my calculations were correct.

SSI charts are based on Navy Charts. I thought they WERE the same as the Navy charts.

[nrembis]

Nothing is based on navy charts anymore.....too many lawsuit happy people in the USA

Glad your class went well and you were correct