This month, more images of listening devices are posted, from the Harvey Hayes Family Archives, thanks to Roy Manstan. The new photo set shows some of the experimental listening devices, or "tubes" in the vernacular of the time.
While the most distributed "tubes" on submarine chasers was the C-Tube Hydrophone, a number of much more elaborate devices were tested at Nahant and in new London, many of them mounted on submarine chasers to test at sea, in experimental runs using a U.S. submarine as a sound target.
Also posted are additions to the Hull Number Collection. And many more sets to come! Enjoy the summer.
--Todd Woofenden, editor.