Does Terrain Follow require RTK to be engaged?

I setup a mapping mission and said to terrain follow.  It downloaded the "internet map" while I was at home and connected to wifi.

Then, I went into the field and started the mission and it told me I needed to turn on RTK.  I did not have our Emlid or other means of connecting, so I went back and changed the mission to a fixed height.

Can I follow terrain without the RTK?

Thanks!

Yes you need RTK for TA. Without RTK your altitude is not accurate enough.

patiam Posted at 4-26 22:01
Yes you need RTK for TA. Without RTK your altitude is not accurate enough.

Thank you for confirming

I should qualify that there are DJI drones/flight apps that will let you attempt TA w/o RTK but best practices are to make sure it is fixed, especially for low-altitude TA.