Dragonfly 5 Pro sonar log file problem

[Chuck - Raymarine - Moderator]

Jim,

No explanation can be provided for the missing data, as we have been unable to duplicate the reported problem and this is the first such instance of this problem.

Q1. I noticed that all but the most recent 2 of my DepthInfoLog.sdf files on the chip have the same date, which is probably the date of my last Navionics upload. It is confusing, because it looks as if every log ever created stays on the chip but gets stamped with a new file date every time I upload. I would have thought that once a log is uploaded to Navionics it is no longer needed and would be erased from the chip.
A1. By design, sonar logs are not are not erased from a Navionics chart card ... this is partially because sonar logs require very little storage (approximately 20kB/hr). As the same sonar logging feature is used by Raymarine's MFD's running LightHouse II software to additionally support the SonarChart Live feature and support use of the logged data prior to Navionics cartography updates.

Q2. How is this file handling between Navionics and Raymarine supposed to work? Also, the files all seem to be about the same size, around 260Kb, regardless of whether a trip was 2 hrs or 10 hrs. How can that be?
A2. See the response to Q1. Like the Archive.fsh waypoint/route/track files previously supported by Raymarine's MFDs and Dragonfly displays, any sonar log created will initially be created with the file size which you have specified. This file will fill with data at the rate reported within the response to Q1 until the quantity of data stored therein exceeds that 260kB, at which point the reported file size should continue to grow.

Q3. Do you recommend that I do a "factory reset" on my chip to see if that gets things working properly again? Other ideas?
A3. Given that we have been unable to duplicate the reported issue, it is recommended that you verify that the Dragonfly display has been updated with the latest software update. If so, then you may want to consider performing a System Settings Reset to the Dragonfly display to have it perform as expected. The is also a possibility that the Dragonfly display's software may not be properly detecting that the Navionics Chart card has an active Freshest Data Updates subscription and therefore block saving sonar logs. This problem was only recently corrected in LightHouse II v19.03 software for MFDs. The workaround had been to insert the chart card only after the display has been powered ON and has completed initialization.