Navigation Data
Source navigation files bundled as "zip". These data contain as received from the remotely operated vehicle (ROV) or ship data provider.
Oceans 2.0 API filter: dataProductCode=ND
Format
Source files vary in format depending on the ROV or ship data provider, and "zip" is the format of bundling the the source data. See below for the device specific parameters.
A generic unzipping application such as 7-zip or Keka can be used to open the zipped format into a folder of source files. The source files may require specific software for viewing or playing back files.
Oceans 2.0 API filter: extension=zip
Device-specific Parameters
ROV Argus Navigation (DeviceID 23530):
Argus navigation data processed on the ship are bundled in a single zip file. This includes sampled, trimmed, and merged directories. These contain latitude, longitude, and depth re-sampled to 1 second intervals to provide a 3D navigation solution. The trimmed directory contain raw files trimmed to the dive interval. The sampled directory contains data simplified, filtered, and re-sampled with depth as negative down. The merged directory contains a trimmed and re-sampled 3D navigation solution with depth as positive down. Argus also has source data that is combined with data received for Hercules navigation in .HER and .NAV files. These files are archived with Hercules (DeviceID 23531) and will need to be downloaded separately.
E/V Nautilus Navigation (DeviceID 23529):
E/V Nautilus navigation data is processed and bundled into .zip files of either daily log files (in .txt format), or source files. The parsed data available for download includes latitude, longitude, and heading all sampled at 1 second intervals. The .txt files and source files are bundled into a .zip file containing files with the name format EVNAUTILUSNAV01_datefrom(yyyymmddT000000.000Z).
Prior to 2018/07, 3 source file types can be downloaded from Oceans 2.0 (.INNAV, .BNAV, and .SPSOL). From 2018/07 onwards, the decision was made to archive just .INNAV files in Oceans 2.0, as these are considered the the most reliable and are used to create the .txt log files. Data lines from the .INNAV, .BNAV, and .txt files are in standard NMEA-0183 format.
.INNAV files are integrated, filtered navigation solution for the ship from the Seapath navigation system. Sentences may include $INGGA (vessel position), $INHDT (Vessel true (non-magnetic) headings), $INZDA (time), $INVTG (course made good).
.BNNAV files are a navigation solution from the bridge. These are typically less reliable than the .INNAV files. Sentences may include $DPGGA (vessel position), $DPVTG (course made good), $DPMWV (wind speed and direction), $DPROT (rate of turn).
.SPSOL files are Seapath 330+ ship's navigation and attitude sensor. The columns are as follows: Header, Time (epoch seconds), Latitude (decimal degrees), Longitude (decimal Degrees), Height (meters), Heave (meters), Velocity_north (m/s), Velocity_east (m/s).
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