Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 13-10-2008, 16:03   #1
Registered User

Join Date: Jul 2008
Location: Denman Island, BC
Boat: Cooper Prowler 36'
Posts: 36
Three radar questions

Just bought a 36' sundeck cruiser and would like to mount a new radar on the front of the flybridge, where the searchlight is curently located. Three questions:
Will this fry private parts of those in the flybridge ,
Will it give good coverage behind the boat through all the propane tanks etc. stored above and,
Since I have an older came-with-the-boat Garmin chartplotter (182C), is there a radar I should buy that will connect to newer chartplotter/integrated packages that I might buy when the shock of the boat purchase goes away?
(I tried to search for a similar thread but no joy - sorry if this repeats..)
__________________

__________________
denmanislander is offline   Reply With Quote
Old 13-10-2008, 17:37   #2
Eternal Member
 
Chief Engineer's Avatar

Join Date: Aug 2006
Location: North of Baltimore
Boat: Ericson 27 & 18' Herrmann Catboat
Posts: 3,798
Personally I don't like the idea of mounting a radar in front of a flybridge.

There will be many on this board that will say it won't hurt you.

The key is unobstructed "view" for the radar.

Also you have to figure in what the angle the boat will be at under speed.

If it is bow up, you will be looking at the sky in the front and into the water on the stern. (exaggeration)

Remember that radar is a line of sight operation
__________________

__________________
Chief Engineer is offline   Reply With Quote
Old 13-10-2008, 18:04   #3
Registered User
 
Ziggy's Avatar

Join Date: Apr 2008
Location: U.S., Northeast
Boat: Contessa 32
Posts: 1,421
Images: 2
Exposing yourself (or your crew) to rf radiation is not a good idea over the long run. I would install it somewhere above head height. This will also avoid the propane tanks or other metal objects interfering with the line of sight.

As far as I know, radar scanners only integrate with same brand chartplotters, specifically designed for radar integration. Raymarine, Furuno, and Garmin all sell radar/chartplotter combos.
__________________
Ziggy is offline   Reply With Quote
Old 13-10-2008, 20:23   #4
Registered User

Join Date: Aug 2008
Posts: 238
I don't know for a fact but it may make your "parts" glow in the dark like a lightning bug and you will be of no further use to your spouse except your paycheck and boat.

Way back in 1940, two scientists, Sir John Randall and Dr. H. A. Boot, invented a device called a magnetron to produce microwaves in their lab at England's Birmingham University.
What did they want the magnetron for?
Real simple - to cook the Nazi's goose.
The magnetron is a key component to the radar (radio detecting and ranging) which bounced microwaves off the enemy's war machines to detect their presence.
Cooking food was not exactly part of their vision.
After the war, in 1946, a Raytheon Company engineer named Dr. Percy Spencer was about to make history.
Doc Spencer was performing tests on a magnetron tube when he got strong cravings for the chocolate bar that was in his pocket.
He reached into his pocket only to be surprised by a nice gooey mess. (Some claim that the chocolate was on his desk and not in his pocket.) Doc Spencer was well aware of the fact that the magnetron produced heat, but he did not sense any. He suspected that the magnetron had melted the chocolate, not his body heat.
(Now, I don't know about you, but if I noticed that all the food products brought near this thing were being quickly cooked, I would assume that the machine was doing the same to me. I really doubt that a new type of oven would be my first thought...)
He needed to test his theory that the magnetron was cooking his food.
He had to use... (drum roll please)... Science!
He sent out for a bag of popcorn and placed it in front of the magnetron tube.
Guess what? The popcorn popped all over the floor.
The next morning he tried cooking up some eggs. In a very famous incident, one of his fellow colleagues was very curious and happened to get a bit too close - the egg blew up in his face (Is this where we get the expression egg on his face?).
Raytheon set out to make the first microwave oven. Since the magnetrons were used to make radars, they gave it the name Radar Range.
__________________
Bill Burgette is offline   Reply With Quote
Old 14-10-2008, 02:29   #5
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,586
Images: 240
See also “RADAR in the marina”
cruisersforum.com/forums/f13/radar-in-the-marina-7309.html
RADAR in the marina
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 23-10-2008, 07:25   #6
Registered User

Join Date: Jul 2008
Location: Denman Island, BC
Boat: Cooper Prowler 36'
Posts: 36
Thanks all! Will, I think, get a SS mast for aft of the flybridge and put the dome up there out of the way and higher up.
__________________
denmanislander is offline   Reply With Quote
Old 23-10-2008, 11:30   #7
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,152
Check the vertical beam angle. You may still be getting EMF even if your head is below line of sight of the antenna.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 23-10-2008, 13:51   #8
GreatKetch
Guest

Posts: n/a
I wonder....

Why not just read your radar installation manual? It has all of the details in there about clearances from crew and such details... The primary body parts affected are corneas, not reproductive parts. High intensity microwave RF most certainly does cause cataracts. All other bodily impacts are speculative at best. Blindness however does most certainly suck...
__________________
  Reply With Quote
Old 23-10-2008, 15:03   #9
Registered User
 
Jesse's Avatar

Join Date: Apr 2008
Location: Oro Bay Puget Sound
Boat: Irwin sloop
Posts: 374
In 1962 I was serving on a Nike Ajax missile site. One of my crew mates was worried that the radiation might make him sterile and he voiced his concern to the Inspector General. About 7mo. later he received an answer telling him not to worry, tests had confirmed that it took 3 times as much to sterilize you than it would to kill you, or words to that effect. We all took great comfort in that and were no longer concerned that all the camera flashbulbs in the barracks would pop unless they were in a steel locker every time the target acquisition radar was fired up. Apparently we weren't harmed by it and my grandson doesn't glow in the dark, but there is just something about it that makes me uneasy about being that close to the transmitter.

Jesse
__________________
Jesse is offline   Reply With Quote
Old 23-10-2008, 15:09   #10
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,152
There are four factors that make a trememendous difference in your health. Distance, power, frequency and exposure time all make a difference.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 23-10-2008, 15:48   #11
Registered User
 
Sunspot Baby's Avatar

Join Date: May 2003
Location: New Bern, NC
Boat: Prout Manta 38' Catamaran - Sunspot Baby
Posts: 1,521
Images: 14
Beyond the health risk, mounting it higher will give it a greater horizon distance.

I don't think your old chart plotter supports radar display.

George
__________________
She took my address and my name
Put my credit to shame
Sunspot Baby, sure had a real good time
Bob Seger
Sunspot Baby is offline   Reply With Quote
Old 24-10-2008, 05:46   #12
Registered User

Join Date: Apr 2007
Posts: 718
Quote:
Originally Posted by Bill Burgette View Post
I don't know for a fact but it may make your "parts" glow in the dark like a lightning bug and you will be of no further use to your spouse except your paycheck and boat.
The magnetron in a microwave oven is operated at 100% duty cycle when your on the high power setting. In the typical small boat pulsed radar system, it's less than 1% with an average output of less than 2 watts. Your not going to cook anything with that. The only danger with these low power radars is to the eyes at very close range (less than 3 feet). It is prudent and recommended to mount the scanner above head height. You don't have to worry about the vertical beam angle except within 3 feet of the antenna.

Eric
__________________
fairbank56 is offline   Reply With Quote
Old 24-10-2008, 06:21   #13
Registered User

Join Date: Jul 2008
Location: Orlando, FL
Boat: PDQ 32 DogHouse
Posts: 600
About the health concerns:

I worked on missile guidance systems (Mk74 Mod14; MUCH more powerful than anything Raymarine or Foruno ever put out) in the Navy. My first son was concieved after my first tour in the gulf war and he is autistic. When I tried to have my second child nothing happenned for quite some time. After being tested I was told something about reduced mobility. My ship went into the yards and voila out comes my daughter, perfectly healthy (except for being a teenager now).
My now ex-wife has had two more kids and one of them is also autistic (nothing to do with radar).
Of course, I don't worry about any of that now (snip snip). Besides, it was time to stop after 6 kids.
__________________
amytom is offline   Reply With Quote
Old 24-10-2008, 09:16   #14
Registered User

Join Date: Jul 2008
Location: Orlando, FL
Boat: PDQ 32 DogHouse
Posts: 600
Just realized (after a few more cups of coffee) my last post went well into the TMI zone. Oh well, we're all friends right?
__________________
amytom is offline   Reply With Quote
Old 24-10-2008, 09:31   #15
Registered User
 
CaptHead's Avatar

Join Date: Jul 2008
Location: Los Angeles, CA
Boat: Grand Banks 42 Classic - Heads Up
Posts: 109
Images: 1
Send a message via Yahoo to CaptHead
What about the numerous speed cops that set their working radar guns on their lap? They ended up sterile, or worse with cancer and lost the boys down under.

I was an X-Ray tech and believe me, radar is dangerous long term.
__________________

__________________
Captain Head
1966 Grand Banks 42 Hull #17
Twin Ford Lehman Diesels
Sterling LP over Epoxy
Life is Great, Skip the Beach
CaptHead is offline   Reply With Quote
Reply

Tags
radar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
RADAR in the marina SanSailer Marine Electronics 17 21-10-2008 05:32
Radar Questions Ted and Relinda Marine Electronics 2 17-09-2008 13:57
Radar Reflector throwing off Radar? alexleclainche Deck hardware: Rigging, Sails & Hoisting 2 21-04-2008 20:21
Stand alone radar mario f Navigation 6 10-10-2007 23:15
Radar Mount phorvati Marine Electronics 14 26-02-2007 20:24



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:57.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.