DISS is working. currently only one waypoint navigation mode is available - map always has direction from prev waypoint to current (exception is taking off - some strange things happens and it has random direction). later I will make another mode - all checkpoints on the one map sheet ("back to the zero" or something like that - counters will have zero values when you'll return to base), there is no need to correct caret position every time you pass waypoint.

DISS complex is most hard-to-use device on my opinion. you should set to zero all counter at the beginning of the route and set caret to your actual position (home base). after that counters will constantly increase their values (relative to direction of current route - forward/backward/left/right). map caret will move with same rate. problem is - movement calculations has some error (depends on current landscape, type of surface and what roll/pitch angles has helicopter). let's think you get to the next waypoint (you are lucky!) and map sheet will be changed to next one. after that for realistic level you should move map caret to new position manually, for Advanced it will be moved automatically. if you will forget to do it - you will lost quite soon.
for Simple level it much easier - map caret show you current position doesn't matter what counters values are.