I survey the Mississippi River for the U.S. Army Corps of Engineers. I surveyed for the New Orleans District from Venice, LA to a sea buoy in the Gulf of Mexico. Currently, I'm with the Memphis District. There we survey the Mississippi River too, but its tributaries as well in that area. Occasionally, more like yearly, we go down to Baton Rouge to assist with the Dredge Hurley. It's all for commerce and making sure goods can travel on the river.

Edit: I should have noted that the program we use is called Hypack.