IANTD tables

jluttichau · April 21st, 2007, 05:53 PM

hi, do any of you know which gradient factors were used in the IANTD nitrox dive tables?

Cheers
Jonas

Steve Geraghty · April 21st, 2007, 06:41 PM

Quote: (Originally Posted by jluttichau)

hi, do any of you know which gradient factors were used in the IANTD nitrox dive tables?

Cheers
Jonas

think proplanner was used , no gradient factors

Algorithm: Buhlmann ZHL16
Number of tissues: 16
Compartments: 16
N2 half-times(mins):
4.0, 8.0, 12.5, 18.5, 27.0, 38.3, 54.3, 77.0, 109.0, 146.0, 187.0, 239.0,
305.0, 390.0, 498.0, 635.0
He half-times(mins).
1.51, 3.02, 4.72, 6.99, 10.21, 14.48, 20.53, 29.11, 41.20, 55.19, 70.69,
90.34, 115.29, 147.42, 188.24, 240.03

Altitude range: Maximum= 1400mbar Minimum= 0 mbar.

Depth safety factor: (DEPTH x 1.03) + 1metre

prharris · April 22nd, 2007, 12:02 AM

Quote: (Originally Posted by Steve Geraghty)

think proplanner was used , no gradient factors

Algorithm: Buhlmann ZHL16
Number of tissues: 16
Compartments: 16
N2 half-times(mins):
4.0, 8.0, 12.5, 18.5, 27.0, 38.3, 54.3, 77.0, 109.0, 146.0, 187.0, 239.0,
305.0, 390.0, 498.0, 635.0
He half-times(mins).
1.51, 3.02, 4.72, 6.99, 10.21, 14.48, 20.53, 29.11, 41.20, 55.19, 70.69,
90.34, 115.29, 147.42, 188.24, 240.03

Altitude range: Maximum= 1400mbar Minimum= 0 mbar.

Depth safety factor: (DEPTH x 1.03) + 1metre

There is some padding over the straight Buhlmann tables, I'm not sure if it matches the output from Proplanner.
There was an undocumented switch (which escapes me at the moment) to turn off the padding in PP.

r
Paul

***EBT*** · April 22nd, 2007, 01:48 PM

-hetol

Not sure about the old tables, the new ones are VPM based.

April 22nd, 2007, 02:52 PM

Quote: (Originally Posted by EBT)

-hetol

Not sure about the old tables, the new ones are VPM based.

Yes & they were cut using V-Planner

Steve Geraghty · April 22nd, 2007, 06:32 PM

Quote: (Originally Posted by Mr G)

Yes & they were cut using V-Planner

i had IANTD nitrox and trimix tables back in 94 , dont think v-planner was out then ,

Mr Gurr and Mr palmar were, and so was proplanner , dont think even zplan was on the page in 92/3,or 94

can only remember mig plan and pro out in 92/3.

put hay its all so long ago now my be i am way of the ball .

lizardland · April 23rd, 2007, 01:23 PM

The trimix tables which appeared in the manuals i.e. the ones which were for a gas within a certain range rather than for a specific gas, were produced by Dr RW Hamilton using DCAP. I would imagine the nitrox tables of the same vintage were also by Bill Hamilton.

The new tables are VPM based.

jluttichau · April 23rd, 2007, 04:08 PM

Quote: (Originally Posted by lizardland)

I would imagine the nitrox tables of the same vintage were also by Bill Hamilton.

The tables i'm asking about are based on Bühlmann.

Cheers
Jonas

Steve Geraghty · April 24th, 2007, 01:59 AM

Quote: (Originally Posted by jluttichau)

The tables i'm asking about are based on Bühlmann.

Cheers
Jonas

try asking tom mount on decostop, he well know ,

April 21st, 2007, 05:53 PM	#1 (permalink)
jluttichau(Offline) Custom User Title Join Date: Nov 2005 Location: Denmark Posts: 437	IANTD tables hi, do any of you know which gradient factors were used in the IANTD nitrox dive tables? Cheers Jonas

April 21st, 2007, 06:41 PM	#2 (permalink)
Steve Geraghty(Offline) Banned Join Date: Nov 2005 Location: uk Posts: 25	Quote: (Originally Posted by jluttichau) hi, do any of you know which gradient factors were used in the IANTD nitrox dive tables? Cheers Jonas think proplanner was used , no gradient factors Algorithm: Buhlmann ZHL16 Number of tissues: 16 Compartments: 16 N2 half-times(mins): 4.0, 8.0, 12.5, 18.5, 27.0, 38.3, 54.3, 77.0, 109.0, 146.0, 187.0, 239.0, 305.0, 390.0, 498.0, 635.0 He half-times(mins). 1.51, 3.02, 4.72, 6.99, 10.21, 14.48, 20.53, 29.11, 41.20, 55.19, 70.69, 90.34, 115.29, 147.42, 188.24, 240.03 Altitude range: Maximum= 1400mbar Minimum= 0 mbar. Depth safety factor: (DEPTH x 1.03) + 1metre Last edited by Steve Geraghty; April 21st, 2007 at 06:44 PM.

April 22nd, 2007, 02:52 PM	#5 (permalink)
Mr G Guest Posts: n/a	Tables Quote: (Originally Posted by EBT) -hetol Not sure about the old tables, the new ones are VPM based. Yes & they were cut using V-Planner

April 22nd, 2007, 06:32 PM	#6 (permalink)
Steve Geraghty(Offline) Banned Join Date: Nov 2005 Location: uk Posts: 25	Quote: (Originally Posted by Mr G) Yes & they were cut using V-Planner i had IANTD nitrox and trimix tables back in 94 , dont think v-planner was out then , Mr Gurr and Mr palmar were, and so was proplanner , dont think even zplan was on the page in 92/3,or 94 can only remember mig plan and pro out in 92/3. put hay its all so long ago now my be i am way of the ball . Last edited by Steve Geraghty; April 22nd, 2007 at 07:29 PM.

April 23rd, 2007, 01:23 PM	#7 (permalink)
lizardland (Online) LCS Join Date: Nov 2005 Location: Evidently Chickentown Posts: 591	The trimix tables which appeared in the manuals i.e. the ones which were for a gas within a certain range rather than for a specific gas, were produced by Dr RW Hamilton using DCAP. I would imagine the nitrox tables of the same vintage were also by Bill Hamilton. The new tables are VPM based. __________________ Can you imagine drifting along in the sea with your mouth open and a load of f***ing plankton going in? You'd like it, would you? www.westons-cider.co.uk The Lot isn't the only place to dive: http://www.lulu.com/content/613554

April 22nd, 2007, 12:02 AM	#3 (permalink)
prharris(Offline) New Member Join Date: Nov 2005 Location: Plymouth Posts: 91	Quote: (Originally Posted by Steve Geraghty) think proplanner was used , no gradient factors Algorithm: Buhlmann ZHL16 Number of tissues: 16 Compartments: 16 N2 half-times(mins): 4.0, 8.0, 12.5, 18.5, 27.0, 38.3, 54.3, 77.0, 109.0, 146.0, 187.0, 239.0, 305.0, 390.0, 498.0, 635.0 He half-times(mins). 1.51, 3.02, 4.72, 6.99, 10.21, 14.48, 20.53, 29.11, 41.20, 55.19, 70.69, 90.34, 115.29, 147.42, 188.24, 240.03 Altitude range: Maximum= 1400mbar Minimum= 0 mbar. Depth safety factor: (DEPTH x 1.03) + 1metre There is some padding over the straight Buhlmann tables, I'm not sure if it matches the output from Proplanner. There was an undocumented switch (which escapes me at the moment) to turn off the padding in PP. r Paul

April 22nd, 2007, 01:48 PM	#4 (permalink)
*EBT*(Offline) Just another crouton... Join Date: Nov 2005 Location: Brighton Posts: 413	-hetol Not sure about the old tables, the new ones are VPM based.

April 23rd, 2007, 04:08 PM	#8 (permalink)
jluttichau(Offline) Custom User Title Join Date: Nov 2005 Location: Denmark Posts: 437	Quote: (Originally Posted by lizardland) I would imagine the nitrox tables of the same vintage were also by Bill Hamilton. The tables i'm asking about are based on Bühlmann. Cheers Jonas

April 24th, 2007, 01:59 AM	#9 (permalink)
Steve Geraghty(Offline) Banned Join Date: Nov 2005 Location: uk Posts: 25	Quote: (Originally Posted by jluttichau) The tables i'm asking about are based on Bühlmann. Cheers Jonas try asking tom mount on decostop, he well know , Last edited by Steve Geraghty; April 24th, 2007 at 03:23 AM.