A sonobuoy 10 comprising an upper unit 12 and a lower unit 14, the lower unit, in use, arranged vertically below the upper unit, in which the upper and lower units are releasably retained to each other by a retention feature 54. The sonobuoy further comprising a printed flexible electronic circuit board (45, Fig 15), in which the printed electronic circuit board comprises one or more of a radio frequency identification (RFID) chip (37, Fig 15), an antenna (75, Fig 15), a user display (79, Fig 14), a user input interface (81, Fig 14) and a seawater switch (83, Fig 15).
A sonobuoy
2025-04-23
Patent
Electronic Resource
English