The symbols decorating the central globe (eg the lines coming off the globe) are unlikely to be the alphabet of a message, as they are too stylised and visual. Hence I will suppose the other symbols (-I-, -II, I--) are something we can read off from a signal such as the audio captured from a UA/UP.
So what are the lines decorating the globe?
1. the "double parenthesis" symbol (upper right) is the HONK location. Someone is above a planet (maybe 5C) and honks either the disco scanner or the UP. In other words, when in a signal stream we see/hear "-II" this sets the starting (our) location (in coordinates).
2. When we see/hear a "--I" symbol, add 45 degrees to the current location. Why? Because the line decorating the quadrant associated with --I is subdividing the quadrant in two, ie 90/2 = 45 degrees.
3. When we see/hear a "I--" symbol, add 30 degrees to the current location. Why? Because the line decorating the quadrant associated with I-- is subdividing the quadrant in three, ie 90/3 = 30 degrees.
4. When we see/hear a "-I-" symbol, add 90 degrees to the current location. Why? Because the line decorating the quadrant associated with -I- is circumscribing the whole quadrant, ie 90 degrees.
Obviously, in order to derive two coordinates (long, lat) we need two phrases/streams of the above symbols, both starting with "--I".
Proposed test: HONK disco scanner or scanner + UP above a location in Merope 5C, record audio in the hope of an echo, find streams of ternary symbols as above, and try to derive a location.
TL, DR: yes I know I didn't include any pictures so no one will read this ;P