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02-12-2018, 19:08
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#241
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Moderator and Certifiable Refitter
Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 20,461
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by Ecos
OK,
Must be getting to used to reading posts from cousins in the land of the free
That's right, you guys ain't free yet! Well, our freedom has gotten us this far.
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We are working on it and it won't be long before we will be enjoying the same freedoms .
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
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02-12-2018, 20:19
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#242
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Registered User
Join Date: Dec 2012
Location: Norfolk, VA USA
Posts: 666
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by maxingout
When I spot a cumulonimbus cloud, I turn on the radar and put an estimated bearing line on the cloud. If the cloud is coming down the estimated bear line, then I make a ninety degree turn to get out of harms way.
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A little OT I suppose, but ... turning 90° isn't always the best course to avoid a storm (or even another vessel) - especially if it's moving faster than you can. If you can determine the speed and course of the storm (which you can do with radar - even while you are moving), then you can roughly calculate the best course to put as much distance between you and the storm with the following formula:
course = storm's course ± acos ( your speed ÷ storm's speed )
Once on this course, you can refine it using a simple diagram or maneuvering board. If you're unsure of how to do this (or the many other things you can do with radar and a maneuvering board), I recommend checking out the Radar Navigation and Maneuvering Board Manual.
BTW, has anyone else tried this radar training simulator? Might be a good, safe way to get familiar with the basic features of radar before actually needing to use it.
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02-12-2018, 22:23
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#243
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Registered User
Join Date: Sep 2010
Location: Oregon City, OR
Boat: 37 Uniflite Coastal Cruiser
Posts: 800
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by boatman61
Have to smile at the tales of the all seeing eye..
The number of times I have called commercial vessels to ask if they've seen me and the reply comes back.. "Where are you?" 'Fine off your port bow about 2nm' I respond.. then I have to respond I dont have AIS.
I dont show on their radar because the sea is 2m or over and theres to much clutter. On a day with ripples and 10kts.. No problem.
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But the point is that you saw them. Big ships show up on your radar just fine even if they turn up their sea clutter adjustment and lose you in the noise. I'm always happier successfully looking out for myself rather than hoping the other guy has enough gear so he avoids me.
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02-12-2018, 23:04
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#244
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Registered User
Join Date: Jun 2015
Posts: 15
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Re: Is the radar an obsolete equipment?
We installed a JRC radar before commencing a circumnavigation in 2010. In 8 years we have only used it successfully once to navigate between islands (inaccurate charting) in Indonesia at night.
It did NOT pick up hundreds of small Indonesian and Thai fishing boats at night (most without lights).
Otherwise the AIS (originally receiver and from Gibraltar a transducer) has been wonderful.
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02-12-2018, 23:17
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#245
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Registered User
Join Date: Mar 2011
Location: Los Angeles, CA
Boat: Beneteau 423, 43’
Posts: 174
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by boatman61
No.. His question was.. Is his radar obsolete.
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Really? The title of this thread that I see is “Re: Is the radar an obsolete equipment?”
Not “his” radar, “the” radar. And the responses are exclusively related to the obsolescence, or lack there of, of radar.
The OP could clear this up but I’m not sure we heard much from him since his original post.
Cheers,
F.
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02-12-2018, 23:24
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#246
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Registered User
Join Date: Aug 2010
Location: AUSTRALIA
Boat: westsail 28
Posts: 8
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Re: Is the radar an obsolete equipment?
God there’s a lot of wankers on these threads (did i spell that right?)
IS RADAR OBSOLETE EQUIPMENT
no it’s not, although I took the old unit off my boat for
other reasons and get by without it. I have a reasonable amount of miles under the keel and have entered harbour at night sometimes in a sweat. I have paper charts, gps, plotter, and ais transponder. I’ve nearly hit small fishing vessels (tinnies)10nm
offshore, run into pearl farms, picked up trap markers, amongst other things. Is one on my wish list? NO I’d run the fridge more often if i have spare amp hours and keep my food fresh longer. If i had more solar & wind & bigger bank ( both types) then i’d get one maybe, but i’m just a simple sailor doing it on a shoestring.
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03-12-2018, 02:05
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#247
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Registered User
Join Date: Jun 2016
Location: Australia
Boat: Milkraft 60 ex trawler
Posts: 4,653
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by David Gunn
We installed a JRC radar before commencing a circumnavigation in 2010. In 8 years we have only used it successfully once to navigate between islands (inaccurate charting) in Indonesia at night.
It did NOT pick up hundreds of small Indonesian and Thai fishing boats at night (most without lights).
Otherwise the AIS (originally receiver and from Gibraltar a transducer) has been wonderful.
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Not another one?
Didn't you get the memo that radars pick up crab pots, seagulls, sunken shipping containers, logs amongst the chop and even rocks below the water?
Real world meets advertising hype?
Fwiw I used ours this morning in heavy smoke and about 20 knots of wind and wave action.
It could see the island and exposed shipwreck to port.
It could not see the floating isolated danger mark to starboard.
But my eyes could as did the plotter.
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03-12-2018, 03:57
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#248
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Senior Cruiser
Join Date: Jan 2010
Location: PORTUGAL
Posts: 30,652
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by Dooglas
But the point is that you saw them. Big ships show up on your radar just fine even if they turn up their sea clutter adjustment and lose you in the noise. I'm always happier successfully looking out for myself rather than hoping the other guy has enough gear so he avoids me.
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No.. they showed up on my eyeball..
__________________
You can't beat a people up (for 75yrs+) and have them say..
"I Love You.. ". Murray Roman.
While the 'useful idiots' of the West pay to dance to the beat of the apartheid drums.
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03-12-2018, 04:17
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#249
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Senior Cruiser
Join Date: Jan 2010
Location: PORTUGAL
Posts: 30,652
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by Fbfisher
Really? The title of this thread that I see is “Re: Is the radar an obsolete equipment?”
Not “his” radar, “the” radar. And the responses are exclusively related to the obsolescence, or lack there of, of radar.
The OP could clear this up but I’m not sure we heard much from him since his original post.
Cheers,
F.
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Well its obviously a failure on my part not being familiar with American grammar..
To me the thread is about his radar qualified by 'Is The Radar'.. followed by "One question I can not firmly decide is if it's worth to keep the radar (JRC 1800) or to remove it. Aesthetically the boat will be better without, and I am not sure what advantage it adds."
To me this indicates he was refering to his particular model/instrument not radar in general.. but there you go.. my command of foreign languages is somewhat limited.
__________________
You can't beat a people up (for 75yrs+) and have them say..
"I Love You.. ". Murray Roman.
While the 'useful idiots' of the West pay to dance to the beat of the apartheid drums.
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03-12-2018, 10:01
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#250
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Registered User
Join Date: Sep 2010
Location: Oregon City, OR
Boat: 37 Uniflite Coastal Cruiser
Posts: 800
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by David Gunn
We installed a JRC radar before commencing a circumnavigation in 2010. In 8 years we have only used it successfully once to navigate between islands (inaccurate charting) in Indonesia at night.
It did NOT pick up hundreds of small Indonesian and Thai fishing boats at night (most without lights).
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Having used a JRC radar myself in an area where 25-50 foot wooden fishing boats are common, mine certainly picked up most wooden fishing boats at night. If yours picked up NONE ever, I can only conclude that it was either non-functional, or you did not know how to adjust it or interpret the display.
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03-12-2018, 10:05
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#251
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Registered User
Join Date: Sep 2010
Location: Oregon City, OR
Boat: 37 Uniflite Coastal Cruiser
Posts: 800
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by boatman61
No.. they showed up on my eyeball.
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Since it is me, and my family, and my boat, which are at stake in my case - I would rather trust my eyeball AND my radar AND my AIS on a night time passage.
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03-12-2018, 10:26
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#252
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Marine Service Provider
Join Date: Nov 2008
Location: Port Credit, Ontario or Bahamas
Boat: Benford 38 Fantail Cruiser
Posts: 7,134
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Re: Is the radar an obsolete equipment?
Quote:
Originally Posted by David Gunn
We installed a JRC radar before commencing a circumnavigation in 2010. In 8 years we have only used it successfully once to navigate between islands (inaccurate charting) in Indonesia at night.
It did NOT pick up hundreds of small Indonesian and Thai fishing boats at night (most without lights).
Otherwise the AIS (originally receiver and from Gibraltar a transducer) has been wonderful.
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Cheap, low power radar improperly set for STC, FTC, tune and gain.
__________________
If you're not laughing, you're not doin' it right.
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