Hydrographic Surveys at Plattsmouth chute, 2011-13
An Innerspace 456 single-beam echosounder in conjunction with a Trimble® differential Global 
Positioning System (DGPS), HYPACK® navigation software, and Ashtech Z-Xtreme and 
Trimble® R8 Global Navigation Satellite System (GNSS) receivers was used to survey 7 
chutes and 3 backwaters on the Missouri River yearly from …