Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 30-05-2015, 03:47   #16
Registered User

Join Date: Feb 2015
Location: Florida
Boat: 2011 Meridian 391
Posts: 5
Re: Lost AIS with Upgrade to V4

Have you confirmed that the system time on the Mac mini is correct?
__________________

__________________
FlyingDiver is offline   Reply With Quote
Old 30-05-2015, 06:53   #17
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
Re: Lost AIS with Upgrade to V4

Interesting.

Should they not be validated against GPS time stamp rather than local machine time stamp?

Possibly a bug to be discussed with the builder.

b.
__________________

__________________
barnakiel is offline   Reply With Quote
Old 30-05-2015, 09:00   #18
Registered User

Join Date: Jan 2008
Location: Berkeley, CA
Boat: Hylas 47
Posts: 65
Re: Lost AIS with Upgrade to V4

I'm glad that "fix" worked for you. Now you just need to figure out why your system thinks the targets are old the moment they get painted on the screen. For me it had something to do with the change to daylight savings, and by the next morning it was fine again. I do not know how the program works in this regard, but I would check to see if the clock on your computer is matching the local GPS time.

Perhaps someone who really knows how this works could shed some further light.

Greg
__________________
gdavids is offline   Reply With Quote
Old 30-05-2015, 11:46   #19
Registered User

Join Date: Feb 2015
Location: Florida
Boat: 2011 Meridian 391
Posts: 5
Re: Lost AIS with Upgrade to V4

Quote:
Originally Posted by barnakiel View Post
Interesting.

Should they not be validated against GPS time stamp rather than local machine time stamp?

Possibly a bug to be discussed with the builder.

b.
As a Mac developer, I would say no. Using multiple time sources is asking for trouble. Nothing in this requires an ultra-accurate clock, so using system time should be sufficient. Implementing a GPS module that updates the system time to match the GPS time would be a good feature, but it should not be required.
__________________
FlyingDiver is offline   Reply With Quote
Old 30-05-2015, 20:04   #20
Marine Service Provider

Join Date: Aug 2012
Posts: 209
Re: Lost AIS with Upgrade to V4

At least with the old OpenCPN version time was never an issue.
I have now changed the OS X time zone (not time itself) so it is matching with my location (New Zealand) and indeed - the remove options don't cause a problem anymore. But switching back to the "wrong" time zone (gmt+1) does not reproduce the original problem. Somehow contacts seem to be less consitent though - disappearing from time to time...(???)
__________________

__________________
myocean is offline   Reply With Quote
Reply

Tags
ais, lost

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
OpenCPN lost connection with the AIS Oceansat Class B Machiel H OpenCPN 6 31-05-2015 10:58
Raymarine Chart Plotter with AIS, Radar upgrade AquaLeopard40 Marine Electronics 0 05-11-2013 10:20
AIS Simulation - Run VDR to play AIS Nmea file rgleason OpenCPN 16 12-01-2013 11:28
Can You Get Radar & AIS Overlay on Laptop ? AIS Transceiver Recommendations ? lunasea.ds Marine Electronics 22 27-12-2010 14:06
Lost Thrust! Lost Prop? OffSeason Monohull Sailboats 20 07-06-2009 00:57



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:52.


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.