captin slows old outlaw Posted January 12, 2021 Share Posted January 12, 2021 oh isinit fun i am so glad my boat is 2 small for radar. there fine till they go rong. umm i was thing has andy go 2 on his boats he has 2 ove every thing eals Quote Link to comment Share on other sites More sharing options...
suzook12 Posted January 12, 2021 Share Posted January 12, 2021 As my understanding is that a radar works line of sight, @GPSguru can yours be seen thru the fibreglass consul with it mounted there? Or does that cause a slight blind spot? Or has this never been tested for? Saintly Fish 1 Quote Link to comment Share on other sites More sharing options...
suzook12 Posted January 12, 2021 Share Posted January 12, 2021 58 minutes ago, JonC said: If his reflector is obscured then it’s not a problem as whatever is obscuring it will show as a target. I think? But a different style of target? Sorry, I have no knowledge at all of radar other than real basic understanding. It was the saying that a GRP hull will show as scatter? That made me wonder if this would cause a blind spot at range where the reflector would normally be seen easily... I'm guessing that scatter is the signal being scattered in all directions so only a partial amount is reflected? Quote Link to comment Share on other sites More sharing options...
Odyssey Posted January 12, 2021 Share Posted January 12, 2021 GRP doesn’t give a good reflection as the waves go straight through it Quote Link to comment Share on other sites More sharing options...
GPSguru Posted January 12, 2021 Share Posted January 12, 2021 4 hours ago, suzook12 said: As my understanding is that a radar works line of sight, @GPSguru can yours be seen thru the fibreglass consul with it mounted there? Or does that cause a slight blind spot? Or has this never been tested for? No blind spot from the console, as an obstruction it is way too small. You need to imagine the radar is not singular, it is 3D ............ so a full 360 Degree signal would be the classical doughnut shape. Quote Link to comment Share on other sites More sharing options...
suzook12 Posted January 13, 2021 Share Posted January 13, 2021 1 hour ago, GPSguru said: No blind spot from the console, as an obstruction it is way too small. You need to imagine the radar is not singular, it is 3D ............ so a full 360 Degree signal would be the classical doughnut shape. So if you put your echomax behind a wall of GRP the other boats radar still see's it? I get radar transmits in a 360 degree shape but we're talking talking of seeing an object from an angle that it is out of view.... You said earlier GRP scatters the signal Quote Link to comment Share on other sites More sharing options...
GPSguru Posted January 13, 2021 Share Posted January 13, 2021 (edited) 14 minutes ago, suzook12 said: You said earlier GRP scatters the signal Er no, if did then it was badly written ! 😀 GRP is almost 'see through' for microwave signals, that is why GRP boats need a radar reflector to act as a 'target'. On a rag and stick the metal work of the mast will give a tiny reflection, and they often enhance this by raising an octahedral reflector (rain catcher) up the mast in foggy weather. Steel boats will show as a massive and excellent target ............. Radar 'scatter' is a natural phenomenon that occurs to all radio signal over a body of water and it due to mainly water reflections, wave reflections, and temperature inversion', but 'scatter' can have a negative effect when determining accurate direction in relation to true North. Edited January 13, 2021 by GPSguru Quote Link to comment Share on other sites More sharing options...
suzook12 Posted January 13, 2021 Share Posted January 13, 2021 ok, now we understand each other, GRP has little or no reflection because radar signal goes through it, in much the same way your GPS still works in a cabin,,,,, GPSguru 1 Quote Link to comment Share on other sites More sharing options...
Odyssey Posted January 13, 2021 Share Posted January 13, 2021 6 hours ago, suzook12 said: ok, now we understand each other, GRP has little or no reflection because radar signal goes through it, in much the same way your GPS still works in a cabin,,,,, You got it! Quote Link to comment Share on other sites More sharing options...
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