Although the same diameter, the Mark 14 was longer, at 20 ft 6 in (6.25 m), and therefore incompatible with older submarines' 15 ft 3 in (4.65 m) torpedo tubes. The Mark 14 was designed at the Naval Torpedo Station (NTS), Newport, beginning in 1922. It had a fairly small warhead and was intended to explode beneath the keel where there was no armor.
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Facial recognition (or face recognition) is a biometric method of identifying an individual by comparing live capture or digital image data with the stored record for that person. Facial recognition systems are commonly used for security purposes but are increasingly being used in a variety of other applications. The Kinect motion gaming system, for example, uses facial recognition to differentiate among players. Some mobile payment systems use facial recognition to securely authenticate users, and facial recognition systems are currently being studied or deployed for airport security.