precision depth recorder

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precision depth recorder [prə′sizh·ən ′depth ri‚kȯrd·ər]

(engineering)

A machine that plots sonar depth soundings on electrosensitive paper; can plot variations in depth over a range of 400 fathoms (730 meters) on a paper 18.85 inches (47.9 centimeters) wide. Abbreviated PDR. Also known as precision graphic recorder (PGR).

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No references found			I recall the hushed amazement aboard the research vessel Knorr when we first saw high-resolution, deep-tow depth profiles slowly burned into the paper of our malodorous precision depth recorders. Exploring the global mid-ocean ridge: a quarter-century of discovery by Macdonald, Ken C. / Oceanus Precision depth recorders, which draw bottom contours using data from repeated pulses of sound reflected by the seafloor and layers of sediment and rock beneath it, made their debut in 1954. Visualizing the deep sea by Fornari, Daniel J.; Bowen, Adrew D.; Foster, Dudley B. / Oceanus New Tools Improve Seafloor Topography Definition The 1950s brought the introduction of the precision depth recorder, capable of measuring water depths with a resolution of approximately 1 fathom (1. Illuminating the seafloor by Smith, Deborah K. / Oceanus			precipitation number precipitation physics Precipitation Process precipitation static precipitation station precipitation titration precipitation trails precipitation trajectory precipitation-evaporation ratio precipitation-generating element Precipitation-Strengthened Materials precipitator precipitin precipitin test precipitous terrain precise level precise leveling rod Precision precision adjustment precision agriculture precision approach radar precision attribute precision block precision bombing precision casting precision depth recorder precision fire precision graphic recorder precision grinding Precision Machine Tool Precision Mechanics and Computer Technology, Institute of precision net Precision of Chemical Analysis precision sweep Precision, Classes of precision-balanced hybrid circuit Precisionism precoat precoat filter precoating Precoce Précoce Precocial Birds precocious Precociousness precognition precollagenous fiber Precombustion Chamber Precombustion Engine precompact set precompile			Precision Automatic Noise Figure Indicator Precision Automation and Robotics India, Ltd. Precision AVIONICS Vectoring Equipment Precision Ballistic Measurement Equipment precision block Precision bombing Precision bombing Precision Buy Sell Points Precision Cassette Mechanism precision casting Precision Castparts Corp. Precision Castparts Corporation Precision Cinema Progressive Precision Code Precision Color Distribution Technology Precision Communications, Inc Precision Container Air Delivery System Precision Control Packaged Air conditioner Precision Control Relay precision cookie Precision Course Director Precision Craft Model Precision Cut Lung Slice Precision Deep Attack Missile System Precision Depth Digitizer precision depth recorder Precision Destruction Munition Precision Devices Inc. Precision Die Cutting & Finishing Co. Precision Dilution of Position Precision Direct Attack Munition Precision Direction Finder Precision Direction Finding Precision Distance Measuring Equipment Precision Drill Squad Precision Drilling International Precision Driving Instructor Precision Drop Glider Precision Drop Glider System Precision Earth Pointing System Precision Echo Precision Electric Turret Precision Electronic Services, Inc. Precision Emergency Automated Position Reporting System Precision Emitter Location Strike System Precision Encapsulation and Cure System Precision Encoder and Pattern Recognition Precision End Trimmed Precision Energy Services, Inc. Precision Engagement

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