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Specific requests should be made to the marine superintendent prior to departure of the ship from San Diego to insure that a boat meeting your requirements is available. Do not resort to system-defeating measures like blocking vents, etc.īOATS - A 23-ft Hurricane semi-rigid inflatable boat (SRIB) is normally carried by Roger Revelle as a work boat. If the ventilation or air conditioning in your room or working space seems not to be operating correctly or not to be controlled properly by the pertinent thermostat, please ask the engineer on watch for help. It is one of two means (the other is the starboard quarter crane) to lead trawl wire or 0.680" EM wire overboard, and is the only route for fiber optic cable.ĪIR, COMPRESSED - (See COMPRESSED AIR in this section.)ĪIR CONDITIONING AND HEATING - The ship's air conditioning system is extensive and complex, with zone-by-zone and even room-by-room control. It is rated above the breaking strength of 9/16" wire (32,500 lbs) in its braced position, and has a safe working load of 18,000 lbs when in motion (hydraulically driven). Heading corrections are derived from the ship’s motion reference systems and the Ashtech differential GPS array - these corrections are applied to the data in real-time.Ī-FRAME - The A-frame is located at the stern. The system takes inputs from the ship's motion reference systems and GPSes. Data processing and recording are done on a Linux (Ubuntu) system using UHDAS software.
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Data are processed and current profiles are displayed in real-time on a color monitor. When the bottom is within range, an earth-referenced vessel velocity can be obtained which allows for the measurement of absolute currents. Current profiles can be produced in as many as 128 depth cells, each cell being variable from 1 to 32 meters to a maximum depth of 700 meters. The system utilizes the doppler effect to measure currents in the water column. These provide vertical profiles of ocean current speed and direction. ACOUSTIC DOPPLER CURRENT PROFILER (ADCP) - Roger Revelle has a 75kHz and 150kHz RDI Ocean Surveyors installed that are capable of either narrowband, broadband or interleaved operation.