Little h wrote: ↑Sun Apr 07, 2019 1:31 pm
Ship launched Sonobuoys - (Continued)
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"Standby - Standby - Standby --- Launch (or) Deploy (or) Release"
USS Donald Cook DDG-75
USS Cook DDG 75 16085033728_67d90a0881_o Flickr.jpg taken 12th Jan 2015
150112-N-JN664-144 THE BLACK SEA (Jan. 12, 2015) Sonar Technician 2nd Class Victor Trejo, from San Benito, Texas, launches a sonar buoy into the ocean during an anti-submarine warfare exercise aboard USS Donald Cook (DDG 75) Jan. 12, 2015. Donald Cook, an Arleigh Burke-class guided-missile destroyer, forward-deployed to Rota, Spain, is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 2nd Class Karolina A. Oseguera/Released)
Source; Flickr
Image copied under Creative Commons Licence Attribution-No Derivatives 4.0 International (CC BY-ND 4.0)
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It will be seen that the Sonobuoy Refenrence No. AN/SSQ-53F appears on the sonobuoy being thrown/launched over the ship side. Here is some info (commercial) from one manufacturer of this type:-
All Products from Sonobuoy TechSystems
Passive Sonobuoys
Localization, or the precise determination of a submarine’s location, course, and speed, is done with passive sonobuoys whenever possible. In the 1980s, when airborne US Navy searched for submarines, passive sonobuoys typically performed the majority of initial detections. Passive tactics are used because they deny a submarine the knowledge that a tracking aircraft is present. The “A” size sonobuoys discussed below can be air-launched since they all employ a parachute to retard their descent and provide descent stability. They can also be hand-launched over the side of a ship. All employ a battery which is energized upon saltwater contact. Once energized, a mechanism for inflating a float with CO2 gas is activated, suspending the sonobuoy. The sensors are then released to specified depths.
Passive sonobuoys use hydrophones to convert underwater sound into electrical signals which are amplified and frequency modulated for VHF transmission. Some sonobuoys have precision-calibrated hydrophones. Most sonobuoys automatically scuttle within 8 hours of deployment. Sonobuoys are typically shipped in a Sonobuoy Launch Container (SLC) that serves as the shipping, storage, and aircraft launch container or in a gray overpack for pneumatic or free-fall launch.
For the DIFAR (Directional Frequency Analysis and Recording) sonobuoys, the main sensor is a hydrophone that has directional detection capabilities. The latest generation of DIFAR sonobuoys offers various sensor types, electronic selection, and post-launch control.
AN/SSQ-53F DIFAR
The AN/SSQ-53F DIFAR is a directional passive sonobuoy no longer being produced for the U.S., but is still available at competitive pricing by removing features from newer model DIFAR sonobuoys. Basic capabilities include four hydrophone depth selections (90, 200, 400, and 1000 feet), five life selections (0.5, 1, 2, 4, and 8 hours), DIFAR, Constant Shallow Omni Sensor (CSO) or a 5 Hz – 20 kHz bandwidth Calibrated Omni (CO) sensor selection capability that is superior to older LOFAR sensors, DIFAR AGC (Automatic Gain Control) On/Off, and the capability to set one VHF transmitter channel out of 96 available channels. Depth, life, sensor, AGC, and channel selection may be set using Electronic Function Selection (EFS) prior to launch and all but depth selection can be changed after deployment via Command Function Select (CFS). RF Power On/Off can also be managed after the sonobuoy is activated. This sonobuoy automatically scuttles after 8 hours.
Download [urlhttps://
www.sonobuoytechsystems.com/webfoo/wp-c ... 3/Q53F.pdf]ANSSQ-53F Data Sheet [/url]
Screenshot (4348).png
Note that this Sonobuoy is also easily deployable from the deck of a ship!!!!!
Source;
Sonobuoy TechSystems