A submersible electronics device for use in a body of water and a substratum floor below the body of water includes a submersible housing, an operational electronics system, and a mobility system. The operational electronics system is mounted in and/or on the housing. The operational electronics system is adapted to communicate with another device and/or to sense at least one of a physical signal and an environmental parameter. The mobility system is selectively operable to fluidize the substratum, vibrate the housing, and/or adjust a buoyancy of the submersible electronics device to selectively move the housing into the substratum to at least partially bury the housing in the substratum and/or to selectively move the housing out of the substratum to at least partially unbury the housing from the substratum.

 
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> Convertible vessel

> Indicator for piloting an aircraft, designed to provide a power parameter of at least one turboprop engine of said aircraft

~ 00501