Hi,I'm having a persistent problem with the mark-related channels: MkRng, MkBrg, MkTwa, NxtMkBrg and NxtMkTwa all show no data, even with a route set and a mark active.Curiously, Mark Tm works fine the whole time — it's only the range, bearing and TWA channels that are affected.The odd part: if I quit Expedition and reopen it, the numbers appear and look correct for a few seconds — then they all go blank at the same time and stay blank. Boat position, wind data and the route itself all continue to display normally.Currently on 12.9.1, but I believe the problem was present on 12.8.x as well. The installation has been upgraded in place through many versions over the years, so I can't rule out that some old setting is carried along.Setup:

• Expedition on a Windows laptop
• NMEA 2000 network, connected via an Actisense NGT-1 (USB)
• B&G Zeus 3s

Things I'm wondering:

• Is there a setting that could cause these channels to be suppressed or overridden after a few seconds?
• Could another device on the N2K network (e.g. a chartplotter sending waypoint/navigation data) be overriding Expedition's internally calculated mark data with empty values? The fact that Mark Tm survives while Rng/Brg/TWA go blank makes me suspect something channel-specific rather than the whole mark calculation failing.
• Or does this sound like a bug?

Happy to provide logs or settings files if that helps. Any pointers appreciated!

Last edited by Martin.Elms (Yesterday 12:59 pm)