NOAA mostly uses multibeam sonar, multiple sound waves that reflect off the ocean floor. Sound bends under water mostly due to pressure and temperature, and salinity to a much lesser extent. It’s very labor- and time-intensive as it requires numerous parallel passes to cover any region. I don’t know the details to…

The reason you can’t buy a personalized jersey with your name or anyone else’s goes back to custom #7 Falcons jerseys with Mexico on the back. Google “Ron Mexico” if you don’t know why.