contents Photo by Fernando Ugarte/courtesy Greenland’s Institute of Natural Resources Greenland Bound: Mapping Critical Mid-Range Depth With The SeaBat T50-R Photo courtesy Kraken "Survey Once, Reuse Many Times" Advanced Navigation Meet Boreas D90 – The First Fully Digital FOG SBG Systems and MacArtney Germany Choosing the Best Inertial Solution Subsea UK And The Creation Of The «Global Underwater Hub» Photo by Tom Acton/Sonardyne Portable, Shallow-water Tracking System