System Requirements

  • Windows 10 64-bit
  • 8GB RAM or more
  • Free disk space: 2GB (but depends on number and size of surveys)
  • CPU: Minimum Intel I-5 2 Ghz or equivalent, Intel Core I-7 recommended (especially with SQ and larger surveys)

Release Notes

September 18, 2023

  • Additional support for SeaQuest 2 gradiometers
  • Text in the application is more compatible with airborne surveys. (e.g. removed references to “fish” and “boat”)

December 5, 2022

  • Create multiple lines in an area marked on the GeoPlot.
  • Fix order of columns in intermagnet parser
  • Fix reset the selected parser for each import of base station readings
  • Fix overlapping survey lines.
  • Fix error in deleting single mag readings.

October 5, 2022

  • Improved support for importing GEM drone mag files, including laser altimeter.
  • Import GEM base station data
  • Improved Gavia AUV import speed, and set GPS fix quality
  • Fix: Allow “>” to be sent to the mag from terminal window.
  • Fix: GPS icon sometimes showed invalid fix when it was valid.
  • Various UI and usability improvements.

June 13, 2022

  • Support GEM drone mag
  • Altimeter series inverted so higher is bigger
  • Marker export improved.
  • USB connections no longer supported. Transceivers are configured as virtual COM ports so only com port connections are needed.

May 31, 2022

  • Improved Guide Line Importers
  • Fixed bug when selecting COM port for repeater.
  • Fixed default wingspans for SeaQuest gradiometers.
  • Exporting gradients have an extra digit of precision (4) now.
  • Numerous UI improvements.

December 21, 2021

Additional support for Sea Quest 2

November 11, 2021

Support Sea Quest 2 differences in zeroing the depth sensor.

October 12, 2021


  • This release improves several features,
  • supports the new SQ2 mag responses, and
  • the Sentinel 2 base station import allows filtering by signal strength.

Profile Plot

  • Initialize visibility of series when loading.


  • Filter by date for base station and AUV data.
  • Don’t import readings to a significant gap in the survey
  • Dialogs are topmost and modal.
  • Add signal strength filter for base station import.
  • Default file type for import set to all log file types, instead of just the intermagnet observatory format.

Survey Lines

  • Keep survey line list from restoring default sort order after an edit.

Geo Plot

  • Calculate GPS time offset relative to mag clock so it has the same sign as shown on sync warnings

Mag support

  • Handle new SQ-2 string


  • Format marker list, change icons for expander and visibility buttons.


  • Log BOB version number to Alert.log

Prior Releases

  • Show signal strength in profile plot
  • Get user consent before upgrading BOB
  • Allow user to enter fraction of a second into marker time in marker dialog.
  • Ok button in preferences closes the dialog now
  • Import Sentinel-2 data.

  • Fix incomplete drawing of path when selecting a survey line in some cases.
  • Improve placement of markers near edges of profile plot.


  • Improve detecting when mag is sampling
  • Stop GPS readings from being logged in newly opened survey before we start sampling.
  • More support for Vector mags
  • UI formatting improved


  • Zoom to mouse point instead of center of screen
  • Show coords where mouse is.
  • More accurate placement of markers.

Mag Profile Plot

  • Sometimes scale was wrong
  • Fix drawing error when crossing midnight.

Log Table

  • Allow user to reorder columns.


  • ¬†Notifications are saved to alerts.log now


  • Individual mag positions are exported for longitudinal gradiometers.
  • Export failed for surveys that cross midnight.