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Country of Origin: Britain


The XBT is an expendable bathythermographic device used by submarines and surface ships to obtain information about ocean temperatures at various depths.

The probe is launched from a through-hull or deck-mounted launcher; as it descends, the communication wire unreels from both the probe and the launcher, allowing measurements to be made in any sea state and at ship speeds of up to 30 knots.

The wire is connected to the Mk 8 data processing system onboard the ship or...

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