Jump to content

Radar reflector


Recommended Posts

Just now, JonC said:

Oh I forgot about that. TBH I help so many people out on YBW with stuff, I get thousands of emails a day so I don’t remember ever person. 

Oh yeah I forgot you go by a different name over there and crusade all day long. 

Link to comment
Share on other sites

7 minutes ago, Odyssey said:

Or just go for an arch....

I’m not getting an arch I don’t like them. Not on my boat. As the radome casts forward why can’t they sit side by side ?

Anyway, is my boat mass not enough to be picked up by another boats radar? Or does the reflector just boost a detection?

Link to comment
Share on other sites

I would have thought that most of the radars were 'programmed' not to react to 'close by' reflections (reflections within a few metres)? ......... I don't have radar but my echomax is mounted on the side of the A frame and only just above the tubes. We have tested it with another boat, and he could see me at well over 4 miles away .........

Link to comment
Share on other sites

Neil, revert to your plan A (staying moored on the pontoon). That would save a heap of money, remove the need to re route the aerial cable and stop the cushions getting smelly!!! If you want a bit of bling you could of course strut mount a radome enclosure.:classic_wink: Geoff.

Edited by Geoff
omitted words
Link to comment
Share on other sites

9 minutes ago, Geoff said:

Neil, revert to your plan A (staying moored on the pontoon). That would a heap of money, remove the need to re route the aerial cable, stop the cushions getting smelly!!! If you want a bit of bling you could of course strut mount a radome enclosure.:classic_wink: Geoff.

Thanks Geoff for your sagely words of wisdom. Don’t you have something to get on with!! 🙄

Link to comment
Share on other sites

3 hours ago, Scotch_Egg2012 said:

Pretty sure most radar doesn't just look forward,  mine gives a 360 view around me.  I mounted my radar deflector above the radar

Yep....

It does give an all round vision, it’s not just a case of looking for a blob on a screen on your heading bearing.... anything that is moving closer to the centre (you) is of worry.... Especially if you’re a WAFI doing 4knts and you got some hooligan in a fishing boat coming at you at 25knts..... 😁😁😁😁😁(Which is prob most of us at least once....) 🤣🤣

Link to comment
Share on other sites

7 hours ago, Odyssey said:

however it’s not perfect on bearings.

That will be due to the scatter effect of the RF signal, it would be made worse by any obstruction within the fresnel zone. As we all know the bearing is the angle between North and the target, and its accuracy depends upon how North is defined by the Radar unit. Most modern Radars will use GPS to define North or a gyro signal is used where azimuth stabilization is used. The accuracy of a well setup system can be as good as +/- 1% .

It is 20 years or more since I played / worked with radar, so I guess even the pulse radars of today have come on a long way since then ......... Doppler direction finding is more my bag .........

 

Edited by GPSguru
Link to comment
Share on other sites

3 hours ago, GPSguru said:

That will be due to the scatter effect of the RF signal, it would be made worse by any obstruction within the fresnel zone. As we all know the bearing is the angle between North and the target, and its accuracy depends upon how North is defined by the Radar unit. Most modern Radars will use GPS to define North or a gyro signal is used where azimuth stabilization is used. The accuracy of a well setup system can be as good as +/- 1% .

It is 20 years or more since I played / worked with radar, so I guess even the pulse radars of today have come on a long way since then ......... Doppler direction finding is more my bag .........

 

Sounds about right 🙂

Just avoid using radar for your 3 point fix.... 😉 Instead fix your position by range to known objects/landmarks and depth to work out your position.

 

I’d did ask in my training as to why I’d do that given that both radar and depth are fed into the same MFD that is my plotter.... the response was that GPS satellites may have stopped working..... so I won’t go into too much detail about navigating using radar as I’m not sure it’s needed..... 😉 

Link to comment
Share on other sites

On 1/10/2021 at 6:58 PM, Saintly Fish said:

Seeing as I have my radome on order, I’m also thinking about an eco max mini deflector. Question is, can I sight it right next to the radar either to the left or right of it? As king as it’s not forward of it, it should be ok ??

 

Remember that your radar looks 360 degrees around the boat, so your ehcomax should either go above the radome or below the radome. On the RIB mine is down low and just above the tubes, but works absolutely fine ............. the ehcomax is classed as one of the best on the leisure / small professional market and does provide a good solid taget, therefore mounting position is probably less important than with octahedral (rain catchers\) type products.

Here you can see mine on the stern starboard side.

IMG_1811.jpg.6464a6343809c6a3d063bc438d743e03.jpg

Edited by GPSguru
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...