pl23_theb2151.jpg
Description
Internal View of Fathometer.From the manual - The Submarine Fathometer
Category
Historic Coast & Geodetic Survey
Nautical Charting
Soundings
Acoustic Sound Systems
Keywords
Charting
Soundings
Electronic
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.