exfinnsailor
Well-Known Member
www.OrwellAIS.com .. Picked it up in the Shipping Section .. Someone has spent alot of time with google maps and AIS .. Shows Ship Movements in real time .. /forums/images/graemlins/cool.gif
AIS Worth a look .. Real Time ..
- Thread starter exfinnsailor
- Start date
geoid96
Well-Known Member
Link does not work for me. Diverts to http://olivecottage.homeip.net/ and gives an HTTP 403.9 - Access Forbidden: message.
FullCircle
Well-Known Member
Link does work - you need to click on AIS when you get to the olivecottage page.
PintPlease
Well-Known Member
just looking through the vessels, clicked on 'Cap Arnauti' (top right ish) and it gave the ship's true heading as 511. eh?
bilbobaggins
N/A
[ QUOTE ]
Don't walk ahead of me. I may not keep up. Don't walk behind me. I may not lead. Just walk beside me as a friend.....
[/ QUOTE ]
....and buy me a pint, please!
Like it!
/forums/images/graemlins/smirk.gif
Don't walk ahead of me. I may not keep up. Don't walk behind me. I may not lead. Just walk beside me as a friend.....
[/ QUOTE ]
....and buy me a pint, please!
Like it!
/forums/images/graemlins/smirk.gif
PintPlease
Well-Known Member
if you're ever in this part of the world it's my round first! /forums/images/graemlins/smirk.gif
Leighb
Well-Known Member
Fascinating, presumably updates regularly?
I will have another look later on.
I will have another look later on.
MartinWaller
New Member
Hello. It's my site and I'd just like to answer a few of the questions posted above. The data for the site comes directly from a NASA AIS Engine plugged into a PC. Software on the PC then decodes the messages received. Typically a message might look like AIVDM,1,1,,B,15MqvC0Oh:G?qj0K?Vp@di4B0@5>,0*44. Contained within the messages is all the information displayed on the web site. There is no delay between the messages being recieved and the message being available for display on the web page. The data contained within the message is controlled to some extent by the setup involved and the captain of the ship. If the setup is not totally plumbed into the GPS then some data, such as True Heading may be wrong. 511 is the default heading when the data is not supplied. The destination information is also sometimes wrong which is down to the captain not setting it correctly. You also get some strange effects when the lat and long are not supplied correctly, you tend to get a blob just to the left and below Long 0 Lat 0. The position and name information are sent out in different messages so the red blobs are ships that I know are there but as yet not received a name / destination message. Once I get the name / destination I turn the blob green. You may also see blobs inland from the sea. These I can only put down to people - having just bought a new AIS transponder - turning it on at home and trying it out. I have seen a few of these. The range is also variable due to atmospheric conditions. The news page shows a screen shot of ships near Dover, this was an exceptional night. Normally I'd be looking at a range of 20 - 30 miles from where I live which puts me just beyond the main anchorages outside of Harwich.
Many thanks
Martin
Many thanks
Martin
fireball
Well-Known Member
Thanks Martin - looks good - what software do you use to decode the AIS messages?
MartinWaller
New Member
Hello,
The software I use to decode is written by me in Javascript. The decoding itself is easy, the difficult bit is finding documentation that tells you how the messages are encoded in the first place. I did eventually find this but it was at the extremities of the web.
Martin
The software I use to decode is written by me in Javascript. The decoding itself is easy, the difficult bit is finding documentation that tells you how the messages are encoded in the first place. I did eventually find this but it was at the extremities of the web.
Martin