Head-up, north-up, course-up
An omni sonar term, in plain English.
Display orientations. Head-up puts the bow at the top; north-up and course-up need heading or course data.
See it in action
The free lessons show where this shows up on a real screen: start with the learning path, try it yourself on the omni trainer, or look it up on real CSH-10 captures in the field guide. Owners and captains talk settings every day on the forum.