gyrocompass - UK Vintage Radio Repair and Restoration Discussion Forum

crestavega · 2nd Dec 2025, 8:55 am

anyone interested in an (operational) Robertson gyrocompass?
complete with interface box etc, does everything (sine/cosine ouutput, AD-10, NMEA0183). "ready to go"
will put some pics up on the for sale thingy if there is any interest.
just pulled it out of an old fishing vessel. everyone is puttiong on sat compasses these days.

Radio Wrangler · 2nd Dec 2025, 11:05 am

With the amount of GPS spoofing and even straight-up jamming on the go these days, having an independent back-up is, um, reassuring.

David

crestavega · 2nd Dec 2025, 7:16 pm

PLaying the long game here. as an islander with wrecker heritage, I love everybodys reliance on GNSS.

I think in the days of GPS as the only constellation, jamming & spoofing was practicable but it seems very difficult now, even cheap gear is coming with all-in-view receivers. 16-19 lines of position is quite normal now. Jamming or spoofing that lot in a practical situation must be a hard task.
I think it is easy enough to spoil it for survey accuracy but for simply navigating A to B in decent vis, 50m accuracy is fine?
isnt it?
what do I know.
there were reportedly problems in the Baltic recently.

2nd Dec 2025, 8:55 am	#1
crestavega Pentode Join Date: Apr 2014 Location: Kirkwall, Orkney, UK. Posts: 178	gyrocompass anyone interested in an (operational) Robertson gyrocompass? complete with interface box etc, does everything (sine/cosine ouutput, AD-10, NMEA0183). "ready to go" will put some pics up on the for sale thingy if there is any interest. just pulled it out of an old fishing vessel. everyone is puttiong on sat compasses these days.

2nd Dec 2025, 11:05 am	#2
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 24,850	Re: gyrocompass With the amount of GPS spoofing and even straight-up jamming on the go these days, having an independent back-up is, um, reassuring. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

2nd Dec 2025, 7:16 pm	#3
crestavega Pentode Join Date: Apr 2014 Location: Kirkwall, Orkney, UK. Posts: 178	Re: gyrocompass PLaying the long game here. as an islander with wrecker heritage, I love everybodys reliance on GNSS. I think in the days of GPS as the only constellation, jamming & spoofing was practicable but it seems very difficult now, even cheap gear is coming with all-in-view receivers. 16-19 lines of position is quite normal now. Jamming or spoofing that lot in a practical situation must be a hard task. I think it is easy enough to spoil it for survey accuracy but for simply navigating A to B in decent vis, 50m accuracy is fine? isnt it? what do I know. there were reportedly problems in the Baltic recently.