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The large-scale survey:
Hydrographic Stations
What happens at a hydrographic station during the large-scale survey?

(1) The Twin Otter lands on the sea ice, and equipment is unloaded.

(2) A 12” diameter hole is drilled through the sea ice to the underlying ocean. (Here we show a smaller drill operation used during NPEO 2003.)

(3) A tent is attached to the aft door of the aircraft, right over the drilled hole. The tent is heated using an gas-powered heater set up on the ice that blows warm air into the aircraft through the pilot’s door.

(4) THICR is deployed through the hole, collecting water samples and digital data.

Then we take off and fly to another site or back to home base!

Polar Science Center
Applied Physics Laboratory
1013 NE 40th Street
Seattle, WA 98105

University of Washington

This material is based upon work supported by the National Science Foundation under Grant No. 0230427.
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the
National Science Foundation.

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