Gandalf-the-Diver
Contributor
New, or get a Peregrine, which would make a nice back up to a Perdix, later.uh oh- 2 shearwater perdix ai with transmitters? 3.5k CAD, or about 2.8 USD
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New, or get a Peregrine, which would make a nice back up to a Perdix, later.uh oh- 2 shearwater perdix ai with transmitters? 3.5k CAD, or about 2.8 USD
New, or get a Peregrine, which would make a nice back up to a Perdix, later.
I started with a Peregrine. I have 245 dives on mine. No Perdix yet.Or start with the Peregrine ( No AI though ) and then get a Perdix AI when he wants to do technical diving.
There’s a long thread on SAC vs. RMV somewhere on here.
What’s RMV?
There’s a long thread on SAC vs. RMV somewhere on here. There is some debate, but the generally accepted answer is:
SAC is Surface Air Consumption, and is measured in PSI/min.
RMV is Residual Minute Volume, and is measured in cu ft/min.
Both are a measure of consumption at 1 atmosphere. With SAC, you can’t transfer to a larger or smaller tank as the rate you consume PSI will change. With RMV, the rate is in actual volume consumed at the surface. With either SAC or RMV you would need to convert for depth to figure out how long a given amount of gas will last.
It's actually Respiratory Minute VolumeOr for the rest of the world
SAC is Surface Air Consumption, and is measured in bar/min.
RMV is Residual Minute Volume, and is measured in L/min.
Yeah, that would actually make more sense. Not sure why I wrote Residual.It's actually Respiratory Minute Volume
Yeah, that would actually make more sense. Not sure why I wrote Residual.
I looked at one on my last trip. A guy had the watch version as a back up. He used it for a bit as his one and only primary, but wanted AI so bought, you guessed it, a Teric. haha.whats deep 6?
We have heard about this previously from @Diving Dubai Here are first, clean air dive NDLs for Suunto Fused RGBM 2, set most aggressively, DSAT, and Buhlmann at a GF high of 95. I have no idea how the Suunto algorithm behaves on repetitive dives. I know from extensive personal experience that DSAT and Buhlmann behave differently, with DSAT becoming relatively somewhat more conservative and Buhlmann becoming relatively somewhat more liberal. Diving Dubai could probably comment on Fused RGBM 2 vs. Buhlman and repetitive dive performance.
View attachment 708437
It gets extremely difficult because there are so many variables. At a minimum, you get a chart like the above for every different Surface Interval (SI). For real dives, you have to also take into account ascent rates, duration and depth of safety stops, and profiles (like square or yo-yo). Not to mention the difference in implementation of the three algorithms above by different dive computer manufacturers, as well as how a manufacturer might implement the algorithm differently in its different models!View attachment 725713
This is a helpful chart from the above post for comparing first dives under Fused RGBM 2 versus the other mainstream models. The differences are relatively close (closer than I thought they might be). As raised in that post, I too am curious if there is any further comparison information for repetitive dives between the Fused RGBM 2 and Buhlman models. Has anyone found any information or have hands on anecdotal experience providing some insight?