Isle of Man, 4-7 September 2014

I am recently back from the Isle of Man diving with Clidive and Isle of Man Diving Charters, skipper Mike and his hardboat with diver lift, who also provided the accommodation. We traveled from London City Airport with BA – it is drivable via the ferry terminal in Liverpool, but the ferry runs at odd hours. However this meant I couldn’t bring my twinset or the heavy backplate I usually use for singles. There were 5 of us, so we dived as a 2 and a 3, which according to BSAC meant at least one of us would surely have died, but actually it was fine and there were no incidents (which was good as we hadn’t brought the right forms to fill in if there had been!) Another group of 5 was booked on but didn’t show up, so there was plenty of space on the boat.

We did 8 dives over 4 days, returning to port between dives:

Dive Description Max/Avg depth (m) Runtime (min)
1 Drinking Dragon (reef named for shape of rock formations above) / The Burroo 21/14 54
2 Clan McMaster (wreck)/Calf Sound(fast drift) 23/13 45
3 Citrine (wreck) 15/13 54
4 Thracian (wreck) 33/23 29
5 Seal Cove, lots of friendly seals! 6/4 60
6 Drinking Dragon 23/16 44
7 Sugarloaf Cave (cavern dive, with air above at all times). Wish I’d brought my camera. 15/9 65
8 Creggy Jeggy (reef) 19/9 54
  Total runtime   405

Equipment-wise, I used GUE single-tank configuration with my 28lb Light Monkey wing and 2.2Kg STA, plus 7.2Kg (made of 2lb and 4lb weights) on a belt, BZ200 undersuit, was well weighted as far as I could tell (which probably means I could have lost a kilo or two), and fairly comfortable in water of 14℃ apart from on the last dive when I started to feel the cold. I wore a 3mm hood and altho’ I brought my drygloves I didn’t wear them. Any colder and I’d want a BZ400 under my Argonaut. SAC overall was 17-18ℓ/min which is back to normal for me. I used a single 12ℓ tank, the others used 15ℓs, but my gas was never the constraining factor in the dive, either time e.g. 50 mins or NDL.

Some great diving, good viz (10-15m), good skipper and boat, certainly stands up to Channel diving. I will certainly be back to that part of the world, tho’ perhaps Pembrokeshire is next rather than going straight back. The only problem was the lack of availability of Nitrox, we only used it for the dive on the Thracian, at £10/fill from Discover Diving. Compare that to £5.85 member’s price at Vobster or £5 at Underwater Explorers! Speaking of Vobster, I have been a bit of a quarrior recently, doing about one weekend a month on skills’n’drills (and thrills and spills!) and of course Tekcamp, so it was good to get out and do some real diving for a change. Next trip planned is Egypt in October with Red Sea Explorers, I can’t wait!

Compressor Operator + Nitrox Blender, 28 January/8 May 2013

Yesterday I completed the BSAC Compressor Operator and Nitrox Blender courses.  These were very challenging, not so much in terms of the contents, which are straightforward enough, but the logistics to actually make it happen. It took – literally – months after doing the theory session to organize a date for the practical work, which we agreed three weeks before, then on the day, it turned out that only I could make it! Special thanks to NI CY for going ahead with just me, but as he said, the tanks needed filling either way.

To be a good blender requires a lot of experience with a particular setup, for example on the equipment we used, no-one knows the actual fill rate, the only way to tell is with a stopwatch and an analogue gauge, and we checked temperatures with our hands and the cylinders were either “warm” or “cool’. Getting an accurate blend means just knowing that on compressor W in ambient condition X, over/underfill the O2 by Y bar, then the air by Z bar, and it’ll all turn out right when the temperature stabilizes. Doing it every day you would quickly develop a feel for it. For now I’ll leave it to the professionals but if at some point I’m diving enough, or in a remote enough location, that getting a J of  O2 and a small compressor is worthwhile, I’ll have that option.