Launching a remote-controlled boat equipped with GPS and an echo-sounding device used for depth measurements in the lake. Note fresh ice debris in the background from recent calving events (9. October 2013, NM). |
Launching a remote-controlled boat equipped with GPS and an echo-sounding device used for depth measurements in the lake. Note fresh ice debris in the background from recent calving events (9. October 2013, NM). |