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nancymontg0m3ry
Joined: 31 Jan 2021 Posts: 1 City/Region: Los Angeles
State or Province: CA
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Posted: Sun Jan 31, 2021 5:37 am Post subject: Hello |
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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/ |
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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
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Posted: Sun Jan 31, 2021 11:39 am Post subject: |
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marinetraffic.com _________________ Conrad Metzenberg
07' Tomcat 255 "Kanaloa"
87' Boston Whaler Guardian 17 (BlackFlag, 03-14)
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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
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Posted: Sun Jan 31, 2021 11:49 am Post subject: |
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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 |
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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
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Posted: Sun Jan 31, 2021 1:43 pm Post subject: |
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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. |
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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
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Posted: Sun Jan 31, 2021 5:26 pm Post subject: |
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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. |
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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
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Posted: Sun Jan 31, 2021 5:30 pm Post subject: |
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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.
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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. |
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