Tec Dive computers and dive plans

[Wibble]

if you spend 30mins to get to where you are and racked up 90mins of deco in the process (at ~75m), then your 30min exit at ~75m back to your deco gas is going to add another 90mins of deco. no its not exact but its not going to be 90mins on the way in and 200 more mins on the way out.

Not according to MultiDeco…

• 30 mins at 70m = 124 mins runtime
• 60 mins at 70m = 280 mins runtime

(GF50:80, 14/55 gas, CCR, 1.3)

 

[lermontov]

Not according to MultiDeco…

• 30 mins at 70m = 124 mins runtime
• 60 mins at 70m = 280 mins runtime

(GF50:80, 14/55 gas, CCR, 1.3)

at 75m its 132min RT and at 60 mins 297 min RT -so its 132 min on the way in and 165min on the way back -its more by 33 min but it certainly not 2.2 time more ( which is the ratio @rjack321 mentioned above)

 

[Wibble]

The 'ratio' around 75m is 1:3. For every one minute at 75m there’s about 3 mins of deco. These rules of thumb are approximate and a rough ready reckoner.

45m is1:1, 60m is1:2

 

[lermontov]

The 'ratio' around 75m is 1:3. For every one minute at 75m there’s about 3 mins of deco. These rules of thumb are approximate and a rough ready reckoner.

45m is1:1, 60m is1:2

the ratio of deco to BT is not the point - the comment that was made was the time including deco to get from a-b is similar to b-a (roughly)