Followed for 3 years and 8 months, from July 2011 to February 2015, across 818 recorded positions.
It ranged between 73°N and 73°N, never leaving the northern hemisphere.
The water and air it moved through ran from -28°C to 6°C.
It averaged 2.2 km a day, every day, across the whole tracking period.
It finished within 1 km of where it started, a round trip closed almost exactly.