TZT9 not showing AIS range and bearing

[SYTIGERLILLY]

My TZT9 is not showing any AIS range or bearing and I can't sort the AIS list by range.
It previously worked just fine but I've been troubleshooting the ais receptio on my ais receiver (a camino108) and now I noted the ranges are missing.
My position and ais targets positions are shown correctly on the chart so I wonder what is missing to give me the range!!??
My vessel is anchored (no speed), and I don't have heading sensor (gyro or so). Is that the problem?

 

[Johnny Electron]

Radars need heading to properly display AIS and determine the proper range and bearing from the boats bow. You might consider adding heading from a sat compass or flux gate (if fiberglass boat) for the ability to conduct ARPA on the radar, conduct overlay, and properly show AIS on the radar.

 

[SYTIGERLILLY]

I am not trying to see AIS targets on radar view/page.
I am using chartploter view/page were I was used to see Al information, Name, MMSI, Range, Bearing, CPA, TCPA. Now range and bearing are missing and I can't figure why.
CPA is still available which is interesting
Please see attached

 

[Johnny Electron]

For bearing you need to have a course established either by heading (which you don't have) or by moving the boat faster than 3 knots to establish a course/COG (course over ground); which you don't appear to have either. I recommend moving the boat and retesting while moving 3 knots or better. As it is now you are a dot on the globe with no established course. If you had a heading sensor it would know 100% your direction and would have the infomation shown sitting still. Short of that the boat needs to establish a course.