Originally Posted by surfmachine
Does the aluminium act as a magnetic shield.
I have a fluxgate
installed inside my aluminium mast
. My experience is that aluminium reduce the sensitivity of the fluxgate
. Does the alu mast
act as a Faraday cage? I have put the question to Raymarine
they are not sure. At first it seem to work fine with a reported deviation of 3 which is good for a steel
boat but when the going get tough it can feed false information to the system with annoying and dangerous consequences. By the way I use nylon fastener.
Originally Posted by David M
Some fluxgates allow you to run a circle with the boat which creates an electronic deviation table which compensates for the iron onboard.
Also at the end of the swinging process of the fluxgate compass
a deviation number will be provided. According to the manufacturer if a number of any value is produced the making of a deviation table is recommended. On my boat I also have two fluxgate installed on the stern. The deviation is as follow.
ST4000 stern starboard 15d
S-1 stern starboard 9d
X-5 stern portside 5d
I always run two fluxgate on the same time, one as an independent compass
, the other as system. Further to a similar thread I find the use of radar
as one of the easiest way of producing a deviation table