Hello readers!
The other thing that has most recently
been slowing me down was the presence of this huge orange ship in the
bay at Casey; Aurora Australis on it's annual resupply voyage.
The Aurora Australis, a 311ft long
Icebreaker that generally resides in Hobart, made it's 16day trip
down through the southern ocean and ice to bring a few passengers, a
bunch of cargo and a bunch of supplies to Casey. It is also starting
it's marine science voyage, during which it will meander through the
southern ocean collecting oceanographic and marine data and samples.
In fact, here's a link to see in live what the view of the ship is:
http://www.antarctica.gov.au/webcams/aurora.
With this big orange blob on the
horizon, a lot of things changed for us at Casey. Resupply means that
the local bar was closed for the duration of AA's presence to not
distract the crew whom have been deprived of alcohol during their
voyage down. It also makes it easier for the Casey staff to be on
time for our 'round-the-clock shifts 7 days a week.
Some shiny new Haggs |
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some of the alcohol order |
The first part of resupply involves
the unloading of all the cargo the ship brought down, that can
include new Hagglunds (our main transport vehicle for long distance
field work, and what we use for all our diving gear), new heavy
machinery, but also new science gear and personnal effects for
summerers and the new batch of winterers. This means we also all
finally received our alcohol allocations, but had to wait until the
ship left (last night), to delve into them.
During the cargo portion of resupply,
the FOCE team was allowed to continue with our project and do some
diving. This meant we were not as actively involved in the transport
of tons of shipping containers to and from the ship. We were however
required to stop all other activities and help when it came to the
time of refuelling.
Icebergs catching on the fuel line |
Casey station runs mostly on Diesel,
but uses some unleaded mixes for their light vehicles (quads and
snowmobiles), and this is the only opportunity for any refuelling to
take place for the next year, making it a critical event.
Watchful morning crew on the lower fuel farm |
There are no other sources of power here, unlike Mawson which also runs some wind
power. Over the
course of about 36hours, we pumped approx 940,000l of fuel through a
narrow (~20cm diameter) hose from the ship to the fuel farms on land.
the fuel line is visible here as the ripples change along it |
Due to the topography, the ship has to stay out in the bay, and
cannot physically dock at Casey, making the whole process much more
challenging. All cargo is moved using a single barge taxi-ing back and
forth, and the fuel line has to be kept clear of all the icebergs and
pieces of floating ice that may snag it.
Because the process involved includes
the installation of tension anchors to hold the fuel line in place
while the boat may swing, and to keep it clear of some of the reef
structures in the bay, the refuelling process involves an extensive
set-up and pack-down process. Ideally these are only done once, but
this year we got 1/3 of the way through refuelling and were warned of
oncoming high-winds so the whole installation was packed down and
refuelling put on standby for a day and a half.
driving icebergs around |
Thankfully weather was very clement
over the days we were pumping fuel, and it was actually a very
pleasant role to have. I do often say I'm much happier on or in the
water than I am on land (I could skiing as being on water for those
wondering about my love of the pistes– it's just frozen water!).
And so I spent a few days zipping around in the bay on a little boat
(IRB), wearing a full flotation suit called a mustang suit, looking
for any evidence of spillage from the fuel line and moving ice floats
either under the hose or using the boats to push them out of the way
of the fuel line. I never thought large chunks of ice could move so
quickly as when you are trying to keep up with them, and definitely
got quite a workout from lifting the heavy fuel line over many small
icebergs.
Sunrise behind the red shed |
Casey at about 04:00 |
Now I know those shift hours just seem
downright cruel, especially starting at 4am, but I was quite happy to
be getting on the water at that hour, when the sun is just below the
horizon, and the light is stunning.
Glassy conditions on the morning of Aurora Australis' departure |
Unwinding after a long week of work |
After about a week and a half in the
bay, the Aurora is now back on it's voyage north. Last night we sent
it off amidst a bunch of expired flares, and celebrated the tension
that left with the ship.
Anticipating last night's big night of
celebration, today was declared a rest day so we might catch up on
some sleep. In the FOCE team we are anticipating the next two days
being pretty busy as we try and sort out some technicalities before
Christmas is upon us.
....And here are some bonus ice-cliff photos taken during one of my shifts to wish you a Merry Christmas.