OBX by CoenM

Question 9

Like the masochists we are we drove to North Carolina, but it did allow us to stop and hang out on a fishing pier that's part of the Chesapeake Bay Bridge and Tunnel, where my inner(?) nerd was happy to find a National Ocean Survey benchmark disk, placed by what UNIT of the Department of Commernce?

National Oceanic and Atmospheric Administration (NOAA)