Our modest contribution is actually all relative. The US operation is alot larger than ours and if you have worked with the yanks then you will know their logistics tail matches their personalities ie go big or go home and as you have mentioned we are abit more modest in our endeavours both figuratively and literally.RegR
By coincidence, I posted the following link in another forum yesterday.
http://www.defence.govt.nz/pdfs/c-17/2016-34-c-17-acquisition-options.pdf
The one-page graphic at the end compares the C-130 and C-17. Buried in the text it mentions that for the current season, NZ has airlifted 50 tonnes to the ice, while the US has airlifted 1100 tonnes. I don't know what the logistics agreement between NZ and the US requires, but our contribution looks a bit modest.
It's also clear from the Cab paper that the B757 is now used primarily to bring people back from the ice at the end of the summer season. I guess that is risk mitigation - it goes down only with crew on board (the potentially risk bit) and comes back with a load of scientists.
The paper itself has some interesting nuggets. It is described on the MOD website as a draft, but has actually dated but not signed out by the CDF and CEO MOD. This means it probably isn't a draft, but presumably was never presented to Cabinet.
Paras 4 and 11 both talk about the economic benefits to Christchurch and NZ of the Antarctic programme. Both are accompanied by a para withheld under section 6a of the OIA, the section that covers NZ's international reationships. Almost certainly referring to the US views on NZ' contribution to Antarctic logistics.
Paras 20-22 talk about changing the existing airlift fleets if a C-17 is bought. There is reference to a 'new commercial narrow-body', which presumably means both B757s would be replaced.
Para 26 notes that purchasing a C-17 will involve bringing forward some planned expenditure from the early 2020s
Para 39 provides Treasury comments - basically either savings have to be made elsewhere or the gov't will have to increase debt.
In the Cab Recs (the 'rubber meets road' part of any Paper),
Para 42 f and j seek authorisation to begin negotiations to purchase the one remaining C-17. Presumably Ministers agreed not to proceed down this track informally, hence the paper was withdrawn.
Para 33 sums it up best:
Our typical summer team is 50 pers whilst theirs is around 1450 with winter 10 and 305 respectively, again all relative. Mcmurdo is a mini town in comparison to our "camp" therefore has the support to match.
Now I'm not denying the overall need for our military airbridge just not really buying all the doom and gloom in terms of participation on this particular front. Yes pooled logistics to better serve both operations for mutual benefit but no need for us to go above and beyond especially at any potential risk to our core military outputs.
Obviously any C17 aqquisition would require us to lose something else in return which is all those summaries indicate in order to fund, maintain and even operate which is exactly why I was not big on the idea (for the numbers gained anyway). Govt will require sacrifice to support which was why the options were put forward for their consideration and ultimately failed, no doubt govt have a cheaper and probably minimal soloution up their sleeve