Question about Garmin GPSMAP 178C GPS Receiver

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I have a Garmin 178c map/sounder and it will not load up my BlueChart Data Card. I bought a new card, thinking that would cure my problem, but it didn't. I would love to get your input what steps to take from here.

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  • Colin May 11, 2010

    Hi Two questions Has the chart worked before with the same card? Have you applied the correct software adjustments as per the manual?

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Posted on Mar 26, 2013

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I have the same problem. Did you ever figure out why it was not loading? There are no software adjustments to be made. Just plug in the card and wait. It says its reading the card, but never goes any further. Let it 'read the card' for hours with no luck. Help!!!

Posted on Jul 05, 2010

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Posted on Jan 02, 2017

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1 Answer

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http://www.advrider.com/forums/showthread.php?t=263745
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Have problems with the loading of the map XPC415S. Australia East coast. Will this map work with this unit?


Any bluechart that has been preloaded on an SD card should work.  Did you purchase your chip with the data preloaded or did you download it yourself?  If you downloaded it yourself, try erasing the sd card, format it, then insert the blank card in the 420 and power it up. This somehow preps the chip for the data download.  Then download the bluechart onto the chip and try again.  There is some ambiguous wording in the download screen that makes it look like some kind of error, try the download anyway and most of the time it will work. After the download is complete it should list the bluechart software version on the screen along with some other software info.  If the operating system software is not v2.5 or higher, you may need to download a software update first.

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