I saw this on YouTube – https://youtu.be/EWs4BXS5P0I
Direct link – Lost 52 Earth YouTube Video Ocean Outreach: https://youtu.be/EWs4BXS5P0I (about 19 seconds long).
These are the general locations of the 52 American submarines lost in World War II. Here is a list by state of where memorials are to be placed: http://militaryhonors.sid-hill.us/mem/statebo.htm.
Individual memorials by state: http://www.oneternalpatrol.com/submarine-losses.htm