Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 05-04-2021, 11:45   #1
Registered User
 
JohnGC's Avatar

Join Date: Mar 2018
Location: SW UK
Boat: Moody 44
Posts: 86
VDR Log file

Hello,

I wonder if anyone who has a VDR file would mind sharing it with me?

Preferably for a sail boat while sailing please. I don't mind which part of the world.

I want to experiment, but C19 continues to prevent me from getting to my boat for at least another 6 weeks.

Thanks,

John
JohnGC is offline   Reply With Quote
Old 05-04-2021, 13:45   #2
Registered User

Join Date: Nov 2012
Location: Orust Sweden
Boat: Najad 34
Posts: 4,209
Re: VDR Log file

John..
Welcome to Sweden
https://www.dropbox.com/s/jc872vqze5...fjord.txt?dl=1
Hakan is offline   Reply With Quote
Old 06-04-2021, 01:26   #3
Registered User
 
JohnGC's Avatar

Join Date: Mar 2018
Location: SW UK
Boat: Moody 44
Posts: 86
Re: VDR Log file

Thanks that's great. We are in the UK with our new (to us) boat in The Netherlands. We haven't seen her since Jan 20. Our plan is to finish the year in Sweden, so I'm taking this as a good omen! Tack!
JohnGC is offline   Reply With Quote
Old 06-04-2021, 08:58   #4
Registered User
 
sv_pelagia's Avatar

Join Date: Apr 2013
Location: British Columbia
Boat: Sceptre 41
Posts: 1,959
Re: VDR Log file

I recently did a blogpost about getting/saving depths from a VDR NMEA file:

http://sailing-pelagia.blogspot.com/...ou-go.html?m=0

At the end of the above blogpost, there is a link to a zip file that contains a relatively small NMEA file from VDR (sorry, not sailing at the time), plus an exe file for getting depths and lat/long from NMEA file.
sv_pelagia is offline   Reply With Quote
Old 07-04-2021, 02:50   #5
Registered User
 
JohnGC's Avatar

Join Date: Mar 2018
Location: SW UK
Boat: Moody 44
Posts: 86
Re: VDR Log file

Quote:
Originally Posted by sv_pelagia View Post
I recently did a blogpost about getting/saving depths from a VDR NMEA file:

Sailing Pelagia: Saving depths as you go...

At the end of the above blogpost, there is a link to a zip file that contains a relatively small NMEA file from VDR (sorry, not sailing at the time), plus an exe file for getting depths and lat/long from NMEA file.
Thanks. That's also very helpful.

Regards,

John
JohnGC is offline   Reply With Quote
Old 07-04-2021, 10:20   #6
Registered User

Join Date: Feb 2019
Location: Cartagena, Spain
Boat: Furia 372 - 11.20m
Posts: 348
Re: VDR Log file

Quote:
Originally Posted by Hakan View Post
I'm seeing in your log that the rudder angle (RSA) appears with a wrong LRC, that's why OCPN doesn't show it on the dashboard.
You are also using the deprecated RMA sentence. RMC is already present, therefore no data is missing.

Josť Luis.
Tehani is offline   Reply With Quote
Old 08-04-2021, 08:21   #7
Registered User

Join Date: Nov 2012
Location: Orust Sweden
Boat: Najad 34
Posts: 4,209
Re: VDR Log file

Josť..
The RMA comes from a rather dated Simrad IS15 and I suppose RMA was active when that system was founded.
The RSA in the beginning is actually my fake but DB-rudder angle works here. Pls explain "wrong LRC"

$IIRSA,-36,A,,*29

RSA - Rudder Sensor Angle

1 2 3 4 5 | | | | |

$--RSA,x.x,A,x.x,A*hh<CR><LF>

Field Number:

  1. Starboard (or single) rudder sensor, "-" means Turn To Port
  2. Status, A = valid, V = Invalid
  3. Port rudder sensor
  4. Status, A = valid, V = Invalid
  5. Checksum
Hakan is offline   Reply With Quote
Old 11-04-2021, 13:21   #8
Registered User

Join Date: Feb 2019
Location: Cartagena, Spain
Boat: Furia 372 - 11.20m
Posts: 348
Re: VDR Log file

Hakan,

The acronym LRC corresponds to Longitudinally Redundancy Check, it is what is known as Checksum, although this name is incorrect. (LRC is calculated with XOR and Checksum with simple additions).
In your VDR file several format errors appear in the LRC, here are some examples:
$IIRSA,28,A,,*b - Single character after * and lowercase letter
$IIRSA,24,A,,*7 - Single character after *
$IIRSA,8,A,,*39 - Correct format
$IIRSA,-2,A,,*1e - Lowercase letter
$IIRSA,-16,A,,*2b<0x0D> - lowercase letter, extra characters

Letters in the LRC must be uppercase.
In that file, the RSA sentence also disappears almost from the beginning.
Tehani is offline   Reply With Quote
Old 11-04-2021, 16:39   #9
Registered User

Join Date: Nov 2012
Location: Orust Sweden
Boat: Najad 34
Posts: 4,209
Re: VDR Log file

Josť..
OK, you're of course correct. These RSA messages in the beginning of that file are probably some test garbage I once put in at my very first attempt to use Python while testing DB instruments. With cs = hex(calc_cksum)[2:].upper() the format is much better.
Sorry for any disturbances.

HŚkan
Hakan is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
How to Convert "*.route" Route File into ".*wpt" File To Be Used in Maxsea V.10 doiroda Navigation 7 12-03-2020 06:00
playback VDR from recorded file skipperearly OpenCPN 34 13-09-2018 05:18
Old Log will be moved to opencpn.log.log PHD1026 OpenCPN 26 19-05-2015 13:01
AIS Simulation - Run VDR to play AIS Nmea file rgleason OpenCPN 16 12-01-2013 10:28
3.0.0 : make package : bad file right after installing the deb file manuprenlair OpenCPN 1 12-06-2012 04:17

Advertise Here


All times are GMT -7. The time now is 19:45.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.