NOAA Ship Fairweather zigzags her way to accurate and precise depth soundings as it starts Arctic depth reconnaissance survey. The officers, scientists, and crew of the NOAA Ship Fairweather have started their 30-day Arctic reconnaissance survey.The diagram produced by Cmdr. Marc Moser in Coast Survey’s Hydrographic Survey Branch, shows the corridor Fairweather will travel during this survey project. The ship will zigzag back and forth within that corridor, checking actual depth soundings against measurements acquired during the 20th century or even earlier.