Wallace & Tiernan 0C-1C/S Bathythermograph Antique Submarine Warfare Navy Gear

Wallace & Tiernan 0C-1C/S Bathythermograph Antique Submarine Warfare Navy Gear (image 3/[null, null, null, null])

Wallace & Tiernan 0C-1C/S Bathythermograph Antique Submarine Warfare Navy Gear (image 4/[null, null, null, null])

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Wallace & Tiernan Company Bathythermograph Serial Number: 10785Useage: Submarine and Anti-submarine warfare to determine the layer depth (thermocline) used by submarines to avoid active sonar search.By monitoring variances, or lack of variances, in underwater temperature or pressure layers, while submerged, the submarine commander could adjust and compensate for temperature layers that could affect sonar accuracy. This was especially important when firing torpedoes at a target based strictly on a sonar fix. More importantly, when the submarine was under attack by a surface vessel using sonar, the information from the bathothermograph allowed the submarine commander to seek thermoclines, which are colder layers of water, that would distort the pinging from the surface vessel's sonar, allowing the submarine under attack to "disguise" its actual position and to escape depth charge damage and eventually to escape from the surface vessel.[5] Throughout the use of the bathythermograph various technicians, watchstanders, and oceanographers noted how dangerous the deployment and retrieval of the BT was. According to watchstander Edward S. Barr: "… In any kind of rough weather, this BT position was frequently subject to waves making a clean sweep of the deck. In spite of breaking waves over the side, the operator had to hold his station, read more

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