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. 2016 Jul 12;7:12093. doi: 10.1038/ncomms12093

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(a) Imaging unit internal components including illumination ring, optical lenses, CCD camera and electronic circuit board with micro-controller. (b) Control unit internal components including user interface with live LCD display and buttons for diver control, single-board computer and battery bank. (c) In situ underwater operation of the BUM by a scientific diver. (d) Close up of the BUM imaging a coral colony in situ, the BUM maintains a distance >65 mm from the specimen during imaging. (a,b,d) Scale bars, 50 mm.