Thread Tools Search this Thread
Old 29 May 2014, 08:45   #1
Country: UK - England
Town: Gillingham
Boat name: Harrys Game
Make: Avon WB 450
Length: 4m +
Engine: Yamaha F50
Join Date: Jan 2014
Posts: 91
Compass and radio seperation

Space for mounting compass etc on the rib is very limited and I seem to remember from somewhere not to place a radio (VHF) to close to the compass. So any tips advice would be gratefully received. Regards Jim

Man chases women until she catches him.
Harrys Game is offline   Reply With Quote
Old 29 May 2014, 09:47   #2
Country: Luxembourg
Town: Luxembourg
Boat name: Kalish
Make: Humber Ocean Pro 6.3
Length: 6m +
Engine: 175 Mercury Optimax
Join Date: Jul 2011
Posts: 408
do a test on your own boat, put your compass and approach your VHF and have a look if your compass is moving. Fyi my compass is about +/-50cm of the VHF ...

Gilles is offline   Reply With Quote
Old 29 May 2014, 09:55   #3
gtb's Avatar
Country: UK - England
Town: Southampton
Make: Ballistic 6.5
Length: 6m +
Engine: Evinrude 175hp ETEC
MMSI: 235 908 002
Join Date: Oct 2012
Posts: 240
Likely depends upon the exact radio and compass, but this manual suggests a minimum separation of 300mm.
gtb is offline   Reply With Quote
Old 29 May 2014, 12:10   #4
CJL's Avatar
Country: UK - England
Town: London
Make: Ribcrafts
Length: 5m +
Engine: 150hp/2x115hp
MMSI: 235090215
Join Date: Oct 2002
Posts: 2,099
Send a message via Skype™ to CJL
I gave up finding a decent location on the console and ditched the compass. I now have a Plastimo hand bearing onboard as a back up and use the plotter for normal use.

A registered charity supporting events across England and Wales
Follow us on Vimeo and Facebook
CJL is offline   Reply With Quote
Old 29 May 2014, 12:22   #5
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
Mine are far too close together for "proper" use (compass about 40cm away from a remote radio speaker and 1m above the radio itself). However on my RIB, compass use is generally limited to going north south east west or some slight variant of those. Even if they were positioned to avoid any possible interference, I could not run a precise compass course on my boat in any kind of sea.

The compass is more of a "go in the right direction to get home backup" to the plotter.

If you place the compass in the desired location you can see the deviations in the driveway with and without the radio in use. Be sure to changing the heading of the boat. In my case its pretty minor <5degrees which is less than my driving over waves errors anyway.
captnjack is offline   Reply With Quote
Old 29 May 2014, 12:45   #6
kerny's Avatar
Country: UK - England
Town: Ashton-under-Lyne Lancs
Boat name: IMOGEN
Make: Air-Craft 5.4
Length: 5m +
Engine: Etec 60
MMSI: 235087492
Join Date: May 2010
Posts: 6,932
Send a message via Skype™ to kerny
Mine is pretty accurate near the vhf but when I switch the plotter on it then it becomes out of sync, but if my plotter went down it is good enough as a back up. A pic to give you some idea.....
Attached Thumbnails
Click image for larger version

Name:	004.jpg
Views:	63
Size:	129.4 KB
ID:	95097  
Member of S.A.B.S. (Lancashire Division)
kerny is offline   Reply With Quote
Old 29 May 2014, 13:06   #7
biffer's Avatar
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
My boat was coded and had to have a swung compass. Just about impossible to do on a rib.
biffer is offline   Reply With Quote
Old 29 May 2014, 13:29   #8
SimonCh's Avatar
Country: UK - Scotland
Town: Stonehaven
Boat name: Sunday Best
Make: Tornado
Length: 5m +
Engine: Yammy 90
Join Date: Mar 2011
Posts: 236
your VHF instructions will have a 'compass safe distance' in them.... but if that fails, just mount it as far as possible, and carry a spare compass with you that you can move around.

When i fitted my new VHF, i was at sea by the time i realised every direction i headed was west!
I think i'll buy a boat*

*I think i'll buy a boat and then spend the rest of my life trying to afford to keep it
SimonCh is offline   Reply With Quote
Old 29 May 2014, 13:36   #9
Festinghouse's Avatar
Country: UK - England
Town: Chorley / Holyhead
Boat name: Northwind Challenger
Make: Tornado
Length: 6m +
Engine: Force/Mercury 120
MMSI: 235080598
Join Date: Jun 2011
Posts: 1,380
Send a message via Skype™ to Festinghouse
my radio is pretty close but doesnt harm the compass, but the plotter is as close as it can be - any closer and it knocks the compass out.

"Life may often suck, but the alternative is unacceptable"
MMSI Sticker

Member of S.A.B.S. (Lancashire Division)
Festinghouse is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 13:01.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.