NavList:

Gary, Murray
The compass binnacle in Oremina, and her five West Hartlepool built sister ships all beginning with Ore…, was housed in the small wooden platform above the navigating bridge my father called “The Monkey Island” (visible in the photograph I posted).  He was pleased to call the spheres “Lord Kelvin’s Tes…les”.  I don’t recall them being painted red and green, or red and blue.  I think that’s just a bit of affectation reserved for museum ships.  I can’t remember if there was a separate binnacle or repeater in front of the helmsman or if the course was fed down by a system of mirrors.  I suspect the former.
I’m still looking at ship’s magnetism.  It’s hard to believe my last tour in the RAF included teaching Aircraft Magnetism and Compass Swinging 81-83.  I’ve forgotten so much.  Lecky (20^th Edition 1920) has a lot to say about ships magnetism going as far as to spend money on red and blue ink.  I’ve not started looking at what the Admiralty Navigation Manual has to say about it yet, but no doubt there’ll be a lot there too.  Google on the other hand has lots of very superficial stuff, often copied and pasted, but little fine detail.  However, I did find this, which was good revision, but it soon travelled way above my pay-scale.  https://deadreckonings.com/wp-content/uploads/2009/04/magneticdeviationanddygograms.pdf

DaveP