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  2. Amazon Echo - Wikipedia

    en.wikipedia.org/wiki/Amazon_Echo

    In March 2016, Amazon unveiled the original Amazon Echo Dot, [51] which is a hockey puck-sized version of the Echo designed to be connected to external speakers due to the smaller size of the onboard speakers, or to be used in rooms such as the bedroom as an alternative to the full-sized Echo. Despite its smaller form factor, the Amazon Echo ...

  3. Amazon Echo Show - Wikipedia

    en.wikipedia.org/wiki/Amazon_Echo_Show

    Amazon Echo Show is a smart speaker that is part of the Amazon Echo line of products. Similarly to other devices in the family, it is designed around Amazon's virtual assistant Alexa, but additionally features a touchscreen display that can be used to display visual information to accompany its responses, as well as play video and conduct video calls with other Echo Show users.

  4. Echo 12 - Wikipedia

    en.wikipedia.org/wiki/Echo_12

    The Echo 12 is a recreational sailboat, built predominantly of fibreglass, with wood trim.For sailing it has a fractional sloop rig, with aluminum spars, a raked stem, a plumb transom, a transom-hung, kick-up rudder made from mahogany, controlled by a tiller and a retractable mahogany daggerboard.

  5. Sonar - Wikipedia

    en.wikipedia.org/wiki/Sonar

    Echo sounding is a process used to determine the depth of water beneath ships and boats. A type of active sonar, echo sounding is the transmission of an acoustic pulse directly downwards to the seabed, measuring the time between transmission and echo return, after having hit the bottom and bouncing back to its ship of origin.

  6. Single scull - Wikipedia

    en.wikipedia.org/wiki/Single_scull

    A single scull (or a scull), abbreviated as a 1x, [1] is a racing shell designed for a single person who propels the boat with two oars, one in each hand. Racing boats (often called "shells") are long, narrow, and broadly semi-circular in cross-section in order to minimize drag. They have riggers, which apply the forces symmetrically to each ...

  7. Multibeam echosounder - Wikipedia

    en.wikipedia.org/wiki/Multibeam_echosounder

    A multibeam echosounder is a device typically used by hydrographic surveyors to determine the depth of water and the nature of the seabed. Most modern systems work by transmitting a broad acoustic fan shaped pulse from a specially designed transducer across the full swathe acrosstrack with a narrow alongtrack then forming multiple receive beams (beamforming) that are much narrower in the ...