Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 28-03-2010, 00:28   #16
Moderator
 
Paul Elliott's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 3,858
Images: 4
hellosailor,

There are cases where a bad checksum is generated, or created, and it is consistantly bad. This can be due to (poor) multiplexer design, or other reasons. While it would be best if the bad checksum were not being generated, as long as the data values are plausible, and agree with other measurements (or common sense), it's probably OK to use, at least until the checksum problem can be properly solved.

I will probably be posting the new version of NavMonPc tomorrow (Sunday) -- I decided to write up a User's Guide Supplement, since there are several significant changes. The Checksum Repair option works well.

I'm not recommending blindly using data with bad checksums, but if you've got a solid hookup that otherwise works reliably, I think you should be able to use the data for a while. If you want to worry about errors, you can always have bogus data with perfect checksums. In fact, I think that's a much more likely scenario.
__________________

__________________
Paul Elliott, S/V VALIS - Pacific Seacraft 44 #16 - Friday Harbor, WA
www.sailvalis.com
Paul Elliott is offline   Reply With Quote
Reply

Tags
ais, nmea

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bad GPS Errors - windsaloft Navigation 2 29-07-2009 08:57
Multitude of Errors Doomed Malu Sara 1960cjj Cruising News & Events 3 30-06-2009 02:31
errors in Publication 229 alan2 Navigation 1 14-03-2009 04:57
Phishing & Script errors Jerry Forum Tech Support & Site Help 2 18-10-2006 12:30
New Post selection errors Talbot Forum Tech Support & Site Help 3 19-08-2006 00:05



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:09.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.