SBG Systems put all its inertial navigation systems to the test during a three-day hydrographic survey in the Hamburg port area in Germany. Test results take the form of interactive maps so hydrographers can select a product and compare its performance through seafloor maps.  SBG Systems and local partner McArtney GmbH tested three grades of the MEMS INS (Ellipse, Ekinox, Apogee) with FOG