| Gas Usage Planning for Expeditions
I and several others (total 5) are off to Scapa this year for at least 4 mix dives (the remaining 6 being Nitrox) and we have a couple of options with regards to gas availability. Gas planned for use is 18/45 with 50% deco.
1. Pay for He on the boat at 3p per litre (O2 is 1p per litre)
2. Take enough twinsets with gas in them (we are taking a Transit but that could be converted into a LWB transit!)
3. Take J's/get J's delivered and cascade
4. Take J's/get J's delivered and boost
If we fill our own tins with He, the skipper doesn't want it done on the boat but the quayside, O2/air tops will be carried out by him.
So, here comes the difficult questions. Once I have worked out the litreage (sp?) of gas required, how do I work out how many J's I need to order if we are going to cascade?
There is already one blender on the team but by the time we get there, there should be 3 of us.
Finally, how much difference does it make if you use a booster (Haskell?) and does anyone know where we can hire one?
Regards |