[PSUBS-MAILIST] Flathead Lake trip

[hank pronk via Personal_Submersibles]

 Alec,Someone did mention that you only use cabin pressure and that helped me get over it.  My concern was that I had to switch to a new absorbent that I have never tried.  The other concern was that you can get thrown off by temperature swings.  Neither was an issue.   Looking forward to the next adventure!Hank
    On Saturday, August 10, 2019, 9:57:22 PM MDT, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Fantastic! Thanks SO MUCH to all involved. Each expedition like this that goes well reduces the barrier to entry for the next scientist or institution to be willing to work with us. I think we have a virtuous cycle going thanks to your efforts. 
Got to smile about the CO2 meter Hank... because I've never used one! I've always relied on a cabin pressure gauge to adjust the O2 flow, while an O2 analyzer with high/low alarms does background monitoring of the concentration. 

Best,
Alec
On Sat, Aug 10, 2019 at 6:34 PM hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hi All,Unlike Cliff and David, I had a short trip home from FLBS today, so I can make the first report on the trip.  All went smooth for Gamma except for a failed CO2 meter,   I was going to cancel one day of diving to drive home and get the spare, but David and I decided that it was safe to dive with just an O2 meter and the altimeter.  I have not practiced with that because I had a reliable CO2 meter for years.  Turns out it is very easy and reliable.  The altimeter correlated perfectly with the O2 meter - just allow for temp drops at the bottom.  David and I had an exceptional dive on a vertical wall about 225 feet deep-in fact the wall had an outcrop above the sub.  We managed to take many samples with the sampler for the science guys.  David and I had to rewire the polarity of the sampler while clinging to the side of the rock wall.  I parked by clinging to the rock wall with forward thrust to keep us in place at the proper depth for sampling while David located bits of sediment among the rocks.  At the same time we had to revers the wires on the relay in the electric panel.   It was a total gas!  We though we might have to drill and blast to get samples and had lots of fun joking in the sub about that.  This was my all time best dive in Gamma and Dave was a riot to have with me.  Dave , Tim and I are ready to compete in the sub launch and retevial  races -we are a well oiled machine, the three of us.  Warning to Cliff, we will be recruiting  Sean to team Canada in the future.  One of my female passenger stated that the sub ride was in the top ten best things she ever did.  Then 10 minutes into the dive she corrected that and said it was in the top five things she ever did.  Finally after cruising the bottom for a while she proclaimed it was the number 1 best thing she ever did.  That was the highlight of the trip for me.Hank_______________________________________________
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