Location of fluxgate rate/gyro compass - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 14 Old 04-17-2008 Thread Starter
Senior Member
 
Join Date: Oct 2007
Location: Beacon Falls CT USA
Posts: 310
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
Location of fluxgate rate/gyro compass

When installing the Simrad RC42 compass, the manual advises to keep the unit 6' away from the engine and away from other 'large metal objects' or sources of strong electrical fields (e.g. batteries & cable runs, inverters, chargers, etc). This leaves me with two options: far forward or far aft.

Which is better for compass-driven auto-pilot performance?
Pub911 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 14 Old 04-17-2008
.
 
Join Date: Nov 2006
Posts: 10,851
Thanks: 0
Thanked 5 Times in 2 Posts
Rep Power: 13
         
Either, or..

the best location is one that is as low as the water line, in the center line of the boat in the middle. This to stop the thing from moving too much with boat movement.

However, it is not that critical if its not dead center.

Just keep it away from the metal objects that are near, such as engine, keel, mast shrouds etc...you should be fine..like I said.. not that critical
Giulietta is offline  
Quote Quick Reply Share with Facebook
post #3 of 14 Old 04-17-2008
ASA and PSIA Instructor
 
Join Date: Apr 2000
Posts: 3,558
Thanks: 7
Thanked 24 Times in 24 Posts
Rep Power: 16
 
The compass for my Alpha 3000 AP also recommended installation as close to the center of the boat as possible...ending up on the inner end of the chart table.

Certified...in several regards...
sailingfool is online now  
Quote Quick Reply Share with Facebook
post #4 of 14 Old 04-17-2008
.
 
Join Date: Nov 2006
Posts: 10,851
Thanks: 0
Thanked 5 Times in 2 Posts
Rep Power: 13
         
Quote:
Originally Posted by sailingfool View Post
The compass for my Alpha 3000 AP also recommended installation as close to the center of the boat as possible...ending up on the inner end of the chart table.
So is mine..a few feet forward of the nav desk, inside the U shaped setee, slightly to port..and so far it never failed
Giulietta is offline  
Quote Quick Reply Share with Facebook
post #5 of 14 Old 04-17-2008
Senior Member
 
Valiente's Avatar
 
Join Date: Jun 2006
Location: Toronto
Posts: 5,491
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
   
This advice is fine for a plastic boat.... but you have fewer options on a steel boat. By the looks of the port spreader, my KVH AC103 fluxgate once sat on a teak pad up there, five metres off the deck. I suspect the original owner swapped out the original pilothouse roof for the current aluminum one, because that is where the compass sits today, and I have "swung the boat" to confirm via bearings, via GPS and via the Ritchie helm compass that it is quite accurate.

Another option I have seen is on aluminum radar arches, but I can't vouch for the performance.
Valiente is offline  
Quote Quick Reply Share with Facebook
post #6 of 14 Old 04-17-2008
Aquaholic
 
AjariBonten's Avatar
 
Join Date: Sep 2007
Location: Fingerlakes & Great Lakes New York
Posts: 1,139
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 8
 
Yea, Val; but everyone knows metal don't float!!!!!!

Unless, of course, it weighs the same as a duck

I got an Old Fat Boat
She's Slow But Handsome
Hard In The Chine, but Soft In The Transom
I Love Her Well, And She Must Love Me
But I think It's Only For My Money
.
..... Gordon Bok
AjariBonten is offline  
Quote Quick Reply Share with Facebook
post #7 of 14 Old 04-17-2008
Learning the HARD way...
 
eherlihy's Avatar
 
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Posts: 3,996
Thanks: 157
Thanked 100 Times in 97 Posts
Rep Power: 9
 
Quote:
Originally Posted by AjariBonten View Post
Unless, of course, it weighs the same as a duck
...in which case it is owned by a witch, and will have to be burnt.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

USCG Licensed OUPV Captain, ASA 101/103/104/105/106/118 Certified Instructor - Also certified in Recreational Marine Electrical Systems
eherlihy is offline  
Quote Quick Reply Share with Facebook
post #8 of 14 Old 04-17-2008 Thread Starter
Senior Member
 
Join Date: Oct 2007
Location: Beacon Falls CT USA
Posts: 310
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
All metals are troublesome? Even an aluminum mast? FYI, the boat is plastic.
Pub911 is offline  
Quote Quick Reply Share with Facebook
post #9 of 14 Old 04-17-2008
Senior Member
 
CaptKermie's Avatar
 
Join Date: Nov 2006
Location: Greater Vancouver B.C. Canada
Posts: 433
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 9
 
To provide more options for mounting positions you can also mount the compass facing forward or aft and if mounted facing aft when swinging it you correct for 180 degrees to get it pointing the right direction. Worked for me on my ST4000 MKII+ I have it under the companionway steps facing aft at the waterline and centerline and between 1/3 & 1/2 the distance LWL forward of the transom, if that makes sense. I measured forward from the transom to get between 1/3 &1/2 turned out to be ideal.
CaptKermie is offline  
Quote Quick Reply Share with Facebook
post #10 of 14 Old 04-17-2008
moderate?
 
camaraderie's Avatar
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 16
     
Forward or aft doesn't matter. Put it wherever it will work and be closest to your control computer.

No longer posting. Reach me by PM!
camaraderie is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Understanding and Using the Magnetic Compass Jim Sexton Learning to Sail Articles 0 03-01-2000 07:00 PM
Understanding and Using the Magnetic Compass Jim Sexton Seamanship Articles 0 03-01-2000 07:00 PM
Understanding and Using the Magnetic Compass Jim Sexton Gear and Maintenance Articles 0 03-01-2000 07:00 PM
Understanding and Using the Magnetic Compass Jim Sexton Cruising Articles 0 03-01-2000 07:00 PM
Understanding and Using the Magnetic Compass Jim Sexton Her Sailnet Articles 0 03-01-2000 07:00 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome