This is just awesome! Shall prepare for purchasing GNSS...

Matt, please excuse my effrontery but is there any intention to support loading of external IMU data for ship's angles compensation? For instance it could make possible usage of multibeam functionality of Lowrance SS 3D and/or any other equipment since XTF is going to be supported.
Thank you.

You demand a lot from software for fishing enthusiasts!
Everything you want is developed by a development team with a million dollar investment in development.
For the most part, the bulk of fishermen do not need this!
All you need is in SonarWiz software SL3 support SS3D input of IMU, RTK, Tide corrections, etc. You are engaged in professional survey, order a demo and try it!

Thanks for such an informative reply but still hope to hear from Matt.

Sonarwiz costs 8k at least and supports a bunch of very special equipment - so this not the case at all. If there could be an option to pay let's say 1k for IMU data support as an additional module - I am the first in the queue ).

Matt, are You plan to use Garmin's .RDS sonarlogs in RM3 or Garmin not allowed for this?

Matt, is any good news about RM3?

Yes and no. It is still happening, but since I can no longer afford to work full time on RM it is taking much longer than I hoped. I'm simply not sure what the estimated release date will be.
As for your previous post concerning Garmin RSD sonar files - this is not something that Garmin are keen on, so it is very unlikely to happen in the near future.

Keep my fingers crossed ;)