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Old 15 April 2019, 12:53   #21
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Originally Posted by beamishken View Post
I must be missing something cos i cant see the usefulness of ais over other nav aids. Apart from the novelty value what does it tell you that radar chart plotter and mk1 eyeball cant?
Ok if your a big ship moving relatively slowly in a busy waterway but a small fast boat that would usualy navigate at 90 degrees to a tss or outside the main chanel what is the benefit of it.
I've never used it on a small boat but have looked for the position of the commercial vessel I've been sat on only to see it shows our position several hours ago.

Personally I think Radar & AIS are very different beasts with a bit of overlap in what they do. Radar will show topography and other targets, but then you have to decide what the targets are. Easy if youíre out in the open, but in a busy area, all youíre going to get is clumps of targets. AIS will show individual AIS beacons, be they ship based, navaids or pseudo navaids. I find it very useful to see where my wingman is in busy or lumpy conditions. Just by glancing at the plotters I can see where he is, even if I canít physically see him.
I donít think Radar & AIS are mutually exclusive, I think they add up to more than the sum of their parts. That said, if I had to choose one over the other, Iíd pick AIS, simply because experience has proved that I use it more than I did Radar.
Just my two penneth.
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
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Old 09 May 2019, 19:28   #22
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The OP was pointing out that web based systems may have a delay when compared to reality.

I'm pretty sure if you were using an AIS transponder working on the VHF channels it was designed to work on all the good stuff being discussed would be live on your plotter screen & useful.

If your data is coming via a 3rd party land based repeater on a random internet server then there may be a delay.

Usefulness of the data on your rib in your chosen cruising grounds is another discussion...

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Old 10 May 2019, 02:19   #23
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9d - not just a delay - but different results at different zooms.
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