Isolation valves or full independent Doubles

[wedivebc]

This whole discussion is completely irrelevent unless someone can explain what possible event could render a diver immediately out of gas.
Independant doubles are always superior to manifolded doubles since no failure can render a diver with out sufficient gas to complete the dive. If both divers are using independant rigs gas donation is also a non-issue.

 

[Centrals]

My initial tec training was on two independent singles but gradually have to switch to manifolded double because all the dive shops were using it.
I really cannot say which is the better of the two but I will still dive with my manifolded twin because it is there.
I assume all SM divers are diving with two single except those who are using "The Box".

 

[PfcAJ]

This whole discussion is completely irrelevent unless someone can explain what possible event could render a diver immediately out of gas.
Independant doubles are always superior to manifolded doubles since no failure can render a diver with out sufficient gas to complete the dive. If both divers are using independant rigs gas donation is also a non-issue.

if your math is right. Better hope you don't get delayed on the exit or ascent somehow. plus, if a diver has bad gas that situation can result in both tanks being compromised.

Manifolded doubles give you options.

 

[Akimbo]

This whole discussion is completely irrelevent unless someone can explain what possible event could render a diver immediately out of gas...

Human error, entrapment, or a SPG/computer with faulty readings. A blown O-ring on the HP side of the first stage, a failed blowout disk, or even a second stage freeflow near the end of the dive could easily leave you with zip in less than 30 seconds.

Then of course there are the Sea Hunt gremlins in black wetsuits that are fond of cutting hoses.