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A comment on The ‘Caspian Sea Monster’ rises from the grave. Parent comment

Re:The ‘Caspian Sea Monster’ rises from the grave by HenryBemis on Friday October 23, 2020 @03:26PM (#24872905)
I will go ahead and assume that they see the Transponder signal and not the actual boats.

If by boats you mean warships, then yes, they may cause a blip in a proper radar.

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Re:The ‘Caspian Sea Monster’ rises from the grave by Retric on Friday October 23, 2020 @05:54PM (#24874671)
No, the current generation of small boat radar are surprisingly capable in both harbors and the open ocean. Decent systems can reliably see a 20’ boat over a mile away in reasonably calm water. Transponders are frequently turned off in harbors for various reasons and are simply not that reliable even in the open ocean.

That said, at longer distances or rough seas things significantly degrade unless you’re talking about a big boat.

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