System Overview Overview 

The JRSO Bathy-2010 system is installed in the Underway Geophysics Lab and consists of a 10kw LPT Transmitter (located at the bottom of the rack), a Sonar Processor, and Windows computer. It is designed to provide the user full ocean depth bathymetry and sub-bottom profiling with a 3.5 kHz transducer array consisting of 12 transducers and a single 12 kHz transducer located in the sonar dome.  The sonar dome is attached to the ship’s hull forward of the moon pool, approximately where the gym is.

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• Verify that GPS data and time is updating in the windows in the upper left corner.  If they are not then refer to the Bathy2010 JRSO User Guide.
• Open the Edit drop down menu and select “Configure Acquisition Parameters…” to set the Power Levels for Channel 1 (3.5 kHz) and/or Channel 2 (12 kHz) if in use.  From the drop down menu, select a power of -24 dB for Channel 1 to begin with and “Apply”.  Note that 0 dB is the maximum power output and drops down from there as a “-“ number. 

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• Note: The transducer power is intentially set low to begin with so that the transducers don’t start pinging loudly and abruptly.  Once the sonar is pinging, the power can be brought up stepwise to get a good return signal.  Go down to the upper tween and lower tween accommodations to hear what the sonar sounds like down there.

Figure 2

• On the main sonar screen, select the depth RANGE from the drop down menu for the water depth range you anticipate the ship is in (Figure 3).  This will set the ping rate and the range of the full depth window.

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• The JRSO does not staff formal underway watches like in the past, however, staff need to monitor the equipment and data streams.
• Open the remote desktop connections for Winfrog 1 and 2 computers on the big screen in the LO Office.  From here, the WinFrog application, Bathy2010, and SeaSpy (magnetometer) can be monitored regularly by the technical staff.
• ·Adjustments Adjustments can be made to the Bathy2010 settings while underway to improve the data quality or find the seafloor if it is lost.  In rough seas it can be difficult to track the bottom and accumulate data.  If conditions are too rough to collect decent data then the system can be turned off until conditions improve, discuss with the LO.

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