Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-08-2017, 10:33   #1
Registered User
 
mrybas's Avatar

Join Date: May 2010
Location: East Coast USA or out cruising
Boat: Lock Crowther 150
Posts: 413
Radar waves safe for humans?

Hi,
My radar used to be mounted on a tall pole well above deck, but I would like to mount it on top of the cabin. I sometimes sit on the cabin top while underway to keep watch. Are there health issues by being on the same level as the radar?
__________________

__________________
mrybas is offline   Reply With Quote
Old 24-08-2017, 10:56   #2
Senior Cruiser
 
Kenomac's Avatar

Cruisers Forum Supporter

Join Date: Jan 2012
Location: Somewhere in the Adriatic Sea
Boat: Oyster 53 Cutter
Posts: 8,449
Re: Radar waves safe for humans?

Quote:
Originally Posted by mrybas View Post
Hi,
My radar used to be mounted on a tall pole well above deck, but I would like to mount it on top of the cabin. I sometimes sit on the cabin top while underway to keep watch. Are there health issues by being on the same level as the radar?
Yes they are safe, but the more important issue is the height of radar and you blocking the signal. You want it mounted as high as possible for better coverage if I'm not mistaken... and I might be.
__________________

__________________
Kenomac is offline   Reply With Quote
Old 24-08-2017, 11:25   #3
Moderator
 
Paul Elliott's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 3,805
Images: 4
Re: Radar waves safe for humans?

Radar waves are generally safe, especially at distances beyond a few meters, but personally, I wouldn't want to want to be sitting that close to the radar and having the beam firing at my private parts. Or at my head.

There are (apocryphal?) stories of seabirds flying through the beam of high-power radars and bursting into flames, but our recreational radars transmit at a vastly lower power.

The subject gets complicated when we start talking about microwave heating, cell damage and mutation, pulse vs CW (or FMCW) radars, etc. I believe the studies that show that low-power microwaves aren't particularly dangerous, but other smart people would disagree with that. Look at the cellphone / cancer connection (or non-connection) debates for example.

I would avoid unnecessary close proximity.
__________________
Paul Elliott, S/V VALIS - Pacific Seacraft 44 #16 - Friday Harbor, WA
www.sailvalis.com
Paul Elliott is offline   Reply With Quote
Old 24-08-2017, 11:30   #4
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 5,698
Re: Radar waves safe for humans?

For long duration exposure, even the small radars we mount can be hazardous. I would not want to be exposed for no good reason like this. As well as mounting the radar lower will limit the horizon distance as well as increase the clutter the radar is blocked by. All in all, for my money, this is an awful idea.
__________________
Sailmonkey is offline   Reply With Quote
Old 24-08-2017, 11:32   #5
Senior Cruiser

Cruisers Forum Supporter

Join Date: May 2013
Location: Oregon to Alaska
Boat: Wheeler Shipyard 83' ex USCG
Posts: 1,675
Re: Radar waves safe for humans?

Besides the reduced range, the radar may be affected by the other items on the top and the top itself.
Your microwave/radar range is the same technology. It heats meat. In the navy, we cooked steaks with the firecontrol radar.
__________________
Lepke is offline   Reply With Quote
Old 24-08-2017, 12:01   #6
Senior Cruiser
 
Kenomac's Avatar

Cruisers Forum Supporter

Join Date: Jan 2012
Location: Somewhere in the Adriatic Sea
Boat: Oyster 53 Cutter
Posts: 8,449
Re: Radar waves safe for humans?

Quote:
Originally Posted by Kenomac View Post
Yes they are safe, but the more important issue is the height of radar and you blocking the signal. You want it mounted as high as possible for better coverage if I'm not mistaken... and I might be.
I didn't realize that you planned on almost sitting on the thing and would risk frying your testicles... forget what I wrote.
__________________
Kenomac is offline   Reply With Quote
Old 24-08-2017, 12:04   #7
Registered User
 
Tkeeth's Avatar

Join Date: Apr 2016
Location: Nola
Boat: 97 Hunter 430 43 ft.
Posts: 361
Re: Radar waves safe for humans?

Wouldn't it be better to use real info than just ask a bunch of people you don't know?

WHO | Electromagnetic fields and public health: radars and human health

Marine radars can be found on small pleasure boats to large ocean going vessels. Peak powers of these systems can reach up to 30 kW, with average powers ranging from 1 to 25 W. Under normal operating conditions, with the antenna rotating, the average power density of the higher power systems within a metre of the antenna is usually less than 10 W/m2. In accessible areas on most watercraft, these levels would fall to a few percent of present public RF exposure standards.
__________________
Tkeeth is offline   Reply With Quote
Old 24-08-2017, 12:05   #8
Senior Cruiser

Cruisers Forum Supporter

Join Date: Feb 2016
Location: Afloat - Mediteranean
Boat: Lagoon 450 F
Posts: 204
Re: Radar waves safe for humans?

Yes, Radar transmissions are technically hazardous, especially at the bands these radars operate in. How hazardous for a given model depends on its power (mainly), frequency, and how close you are to it.

I would not want to sit in front of one for a long period. Whilst the amounts of power are small, and the pulses tiny, prolonged exposure to it can't be good and is worth avoiding.

Quote:
Originally Posted by Paul Elliott View Post
There are (apocryphal?) stories of seabirds flying through the beam of high-power radars and bursting into flames, but our recreational radars transmit at a vastly lower power.
Burst into flames, no, never seen that. Fall pretty much dead from the sky, Yup. However this very close to a ship-born 1MW ContiniousWave fire control Radar. Its effective power vs a boats 20W Nav Radar is (from memory) approx 1 billion times stronger. (Combination of Power, and pulse rate) So we arn't even in the same ballpark here.
__________________
Catapault is offline   Reply With Quote
Old 24-08-2017, 12:14   #9
Registered User

Join Date: Dec 2016
Posts: 420
Re: Radar waves safe for humans?

Side note: I once heard James Lovelock claim that he invented the Radar Range way before Raytheon patented it, as a means for warming premature babies.
I suppose you could keep yourself warm on deck...
__________________
toddster8 is offline   Reply With Quote
Old 24-08-2017, 16:29   #10
Registered User

Join Date: Nov 2015
Posts: 660
Re: Radar waves safe for humans?

Amazon sells some radiation proof underwear to protect the family jewels!

http://amzn.to/2wryaVS
__________________
Keth

Boat Vinyl Lettering and Graphics
Bleemus is offline   Reply With Quote
Old 24-08-2017, 16:55   #11
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 16,819
Radar waves safe for humans?

For what it's worth, the B&G 4 G supposedly has a lower RF output than a cell phone.
I still wouldn't want to nearly sit on it though
__________________
a64pilot is offline   Reply With Quote
Old 24-08-2017, 17:20   #12
cruiser

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Radar waves safe for humans?

I say they are unsafe but what do I know. Ask the manufacturer of your specific model.

This is the sort of question that you shouldn't rely on answers from a boating forum. If you follow the wrong advice you could be harmed now or later.
__________________
rwidman is offline   Reply With Quote
Old 24-08-2017, 18:42   #13
Moderator
 
Paul Elliott's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 3,805
Images: 4
Re: Radar waves safe for humans?

Quote:
Originally Posted by Tkeeth View Post
Wouldn't it be better to use real info than just ask a bunch of people you don't know?

WHO | Electromagnetic fields and public health: radars and human health

Marine radars can be found on small pleasure boats to large ocean going vessels. Peak powers of these systems can reach up to 30 kW, with average powers ranging from 1 to 25 W. Under normal operating conditions, with the antenna rotating, the average power density of the higher power systems within a metre of the antenna is usually less than 10 W/m2. In accessible areas on most watercraft, these levels would fall to a few percent of present public RF exposure standards.
That last sentence (I bolded it) is the key. On most watercraft you wouldn't be able to sit right next to the radome. In most cases the radar is mounted so the plane of radiation is well above head-level (this is for range as well as for safety).
__________________
Paul Elliott, S/V VALIS - Pacific Seacraft 44 #16 - Friday Harbor, WA
www.sailvalis.com
Paul Elliott is offline   Reply With Quote
Old 25-08-2017, 09:36   #14
Registered User

Join Date: Sep 2013
Location: Alert Bay, Vancouver Island
Boat: 35ft classic ketch/yawl.
Posts: 931
Images: 4
Send a message via Skype™ to roland stockham
Re: Radar waves safe for humans?

Look up the manual for your radar unit on line is you don't have a copy. It gives safe mounting instructions and safe exposure distances as part of compliance with radiation safety codes. Never mind the family jewels (most of us are too old to need them!!!!) your eyes are very sensitive to microwave energy.
__________________
roland stockham is offline   Reply With Quote
Old 25-08-2017, 10:02   #15
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 6,002
Re: Radar waves safe for humans?

They say the new radars are safe. If yours is old you night as well crawl in your microwave oven.
__________________

__________________
Cadence is online now   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
Two dogs, two humans, cruising to Mexico! SV Maclas Meets & Greets 2 08-11-2012 15:11
Humans, +3 / Mother Nature, Zero ozskipper Off Topic Forum 10 03-02-2011 12:36
Rogue Waves and Seiche Waves Seaworthy Great Lakes 18 27-11-2007 12:22
Deadly viruses mutating to infect humans at rate never seen before CaptainK Health, Safety & Related Gear 10 23-02-2006 20:04
Rogue Waves GordMay General Sailing Forum 8 27-09-2004 12:56



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 14:36.


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.