The C-Brats Forum Index
HomeForumsMy TopicsCalendarEvent SignupsMemberlistOur C-DorysThe Brat MapPhotos

Hello

 
Post new topic   Reply to topic    The C-Brats Forum Index -> General Chat
View previous topic :: View next topic  
Author Message
nancymontg0m3ry



Joined: 31 Jan 2021
Posts: 1
City/Region: Los Angeles
State or Province: CA
PostPosted: Sun Jan 31, 2021 5:37 am    Post subject: Hello Reply with quote

Does anyone of you know how this ship tracking app works I can't figure it out here's the site. https://ship-tracking.net/
Back to top
View user's profile Send private message Send e-mail
cmetzenberg



Joined: 04 Jan 2014
Posts: 367
City/Region: Santa Barbara
State or Province: CA
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: Kanaloa
Photos: Kanaloa
PostPosted: Sun Jan 31, 2021 11:39 am    Post subject: Reply with quote

marinetraffic.com
_________________
Conrad Metzenberg

07' Tomcat 255 "Kanaloa"
87' Boston Whaler Guardian 17 (BlackFlag, 03-14)
Back to top
View user's profile Send private message Send e-mail
thataway



Joined: 02 Nov 2003
Posts: 20779
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Sun Jan 31, 2021 11:49 am    Post subject: Reply with quote

Most of the marine traffic at sea uses satellite to pick up the AIS signals. These require a subscription to get the details of that specific ship.

The sites are straight forward to use. I also use. Marine Traffic.com. Some recreational vessels AIS will come up at sea. But their position is often delayed.

_________________
Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL
Back to top
View user's profile Send private message Send e-mail
ssobol



Joined: 27 Oct 2012
Posts: 3362
City/Region: SW Michigan
State or Province: MI
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
Photos: SoBelle
PostPosted: Sun Jan 31, 2021 1:43 pm    Post subject: Reply with quote

thataway wrote:
... The sites are straight forward to use. I also use. Marine Traffic.com. Some recreational vessels AIS will come up at sea. But their position is often delayed.


Marinetraffic.com requires an internet connection to use. I have found that in a lot of cases the position reports there can be quite old. I've seen ships plotted, allegedly nearby, but the position report is 3 days old. It is not something to use for real-time collision avoidance. Perhaps having a paid subscription makes it work better.
Back to top
View user's profile Send private message
thataway



Joined: 02 Nov 2003
Posts: 20779
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Sun Jan 31, 2021 5:26 pm    Post subject: Reply with quote

ssobol wrote:
thataway wrote:
... The sites are straight forward to use. I also use. Marine Traffic.com. Some recreational vessels AIS will come up at sea. But their position is often delayed.


Marinetraffic.com requires an internet connection to use. I have found that in a lot of cases the position reports there can be quite old. I've seen ships plotted, allegedly nearby, but the position report is 3 days old. It is not something to use for real-time collision avoidance. Perhaps having a paid subscription makes it work better.


The Class A signal is picked up on the satellite receivers. There are some class B or B+ transceivers which are also picked up by the satellite receivers.

Did you mean that only boats which tracked by the voluntary stations/AIS receivers along the coasts and waterways would show up? (B+ transceivers are 5 watts vs 2 watts for Class B. The Class B+ also grab time slots and should not be delayed by priority of Class A. If the vessel speed is >23 knots, the B+. will transmit every 5 seconds, vs 30 seconds with Class B.

If I were buying an AIS transceiver currently I would buy a B+ which start in the $625 range to about $780 for a Garmin black box unit. The B are a few hundred less.
Back to top
View user's profile Send private message Send e-mail
ssobol



Joined: 27 Oct 2012
Posts: 3362
City/Region: SW Michigan
State or Province: MI
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
Photos: SoBelle
PostPosted: Sun Jan 31, 2021 5:30 pm    Post subject: Reply with quote

thataway wrote:
...Did you mean that only boats which tracked by the voluntary stations/AIS receivers along the coasts and waterways would show up? (B+ transceivers are 5 watts vs 2 watts for Class B. The Class B+ also grab time slots and should not be delayed by priority of Class A. If the vessel speed is >23 knots, the B+. will transmit every 5 seconds, vs 30 seconds with Class B.


I mean that people who use MarineTraffic.com as their source for AIS info via the web interface can only get the AIS info if they have a live internet connection. While this is not the best way to get AIS info from vessels in your area, I'm sure that there are people who do it because "Hey, it's free."

Of course, most things are worth what you pay for them.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    The C-Brats Forum Index -> General Chat All times are GMT - 5 Hours
Page 1 of 1

 
     Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum



Page generation time: 0.1276s (PHP: 28% - SQL: 72%) - SQL queries: 25 - GZIP disabled - Debug on