Remote Boat Channel Bed Elevation Survey - August 16

Current Opened Gates: Automatic operation of middle section gates for 3.5 ft water depth

Channel bed elevation was surveyed using the remote boat with GPS system and sonar. Middle section gates were automatically operated to keep 3.5 ft water depth. 
GPS data was not lodging in the sonar. Distance from water surface to channel bottom were obtained.
The Sonarlite was turned initial mode as shown in Figure1, when the Trimble GPS was connected with (figure 2).
 
 
  Figure 1   Figure 2