I've recently acquired a M3T and have been getting to know it.  In going through the manual, on page 64 under #8b "Sensing Sytem Settings" it indicates three separate switches:   1) obstacle sensing switch, 2) vision positioning switch, and 3) precision landing switch.  I'm failing to see the "precision landing switch".  The drone wants to overshoot the homepoint ,sometimes grossly, and will descend to land where the home point was not recorded.
I feel like I've confirmed the conditions for "Precision Landing" that are stated on page 22 of the manual under the important information section for a precision landing.  Also, I have good satellite acquisition prior to take off.  So, I'm wondering if the precison landing switch noted above may improve the situation, but I can't find it.  Does anyone have any info on a "precision landing switch"?

I don't know about the M3T but with other DJI drones the requirements to enable precision landing INCLUDE a pure vertical climb from launch to in excess of 7m. 4
It might be possible to interput the climb for a short time but NO horiziontal movement is permitted.

I know of no precision landing switch as such but I haven't got a M3T .......


If precision landing was enabled then, when the drone has flown back to above the homepoint, it will automatically turn so as to face in the direction it was pointing when it took off.
That turn is my test to access whether or not a precision landing is about to be executed.

I missed the Precision Landing Switch on my 3T. However the climb and hesitate a bit at 7m is normally a requirement. Mine will rotate back to takeoff orientation. It nails the landing pad virtually every time. With the RTK module attached, it kind of comes back to the exact same spot on the pad. My non-enterprise M3 Cine, not quite as exact, but not bad, again, provided you climb up and hesitate.

Dogpilot Posted at 4-12 14:53
I missed the Precision Landing Switch on my 3T. However the climb and hesitate a bit at 7m is normally a requirement. Mine will rotate back to takeoff orientation. It nails the landing pad virtually every time. With the RTK module attached, it kind of comes back to the exact same spot on the pad. My non-enterprise M3 Cine, not quite as exact, but not bad, again, provided you climb up and hesitate.

However the climb and hesitate a bit at 7m is normally a requirement.
The hesitate bit is just another forum myth.
It isn't mentioned anywhere in DJI manuals.
If precision autolanding is important to you, all you need do is climb vertically for 7 metres before moving horizontally.

I've read in the manual the 7m climb before moving horizontal, but can't re-call if maybe I haven't been consistent in doing that.  However, this afternoon I launched and upon RTH, the drone returned and landed perfectly.  

I appear to have a different problem now as tonight, I could not get good GNSS signal (only 4 to 6 SATs) and a home point could not be recorded.  Just out of the blue this problem arises, I live in a very rural area, the sky was clear as a bell and no obstructions that I could see that would cause it...........any thoughts on that?

Ground_Pilot Posted at 4-12 20:43
I've read in the manual the 7m climb before moving horizontal, but can't re-call if maybe I haven't been consistent in doing that.  However, this afternoon I launched and upon RTH, the drone returned and landed perfectly.  

I appear to have a different problem now as tonight, I could not get good GNSS signal (only 4 to 6 SATs) and a home point could not be recorded.  Just out of the blue this problem arises, I live in a very rural area, the sky was clear as a bell and no obstructions that I could see that would cause it...........any thoughts on that?

GNSS is very simple and reliable.
Just turn the drone on and if the skyview is not obstructed, you should have more sats than you need in a short time.
You should expect to have high 20s or something in the 30s.

Things that can cause reception problems are being under a metal roof, in a cave, under tree cover.
But if you are out in the open and having problems, about the only possible explanations might be:
An accessory fitted to the top of the drone and physically blocking the GPS antenna or electronically interfering.
Or regional GPS interference jamming (which should be rare (or never) in your part of the world.

Labroides Posted at 4-12 23:51
GNSS is very simple and reliable.
Just turn the drone on and if the skyview is not obstructed, you should have more sats than you need in a short time.
You should expect to have high 20s or something in the 30s.

Well, I should've mentioned that I did have the JZT30 spot light on top of the drone last night.  However, I did not think that was the problem because I've been using it before with no problems.  So I hope that wasn't the issue.

Ground_Pilot Posted at 4-13 03:57
Well, I should've mentioned that I did have the JZT30 spot light on top of the drone last night.  However, I did not think that was the problem because I've been using it before with no problems.  So I hope that wasn't the issue.

Perhaps that was the problem.
Particularly as nothing else (as you described your environment) would have affected GPS reception.
What's the body that you clamp on the drone made of and what's inside it?


Easy to do a little testing on the ground.
Fire up the drone ... check the sat number.
Remove the light and check again.
Does it make a difference?
Is the location on the drone always the same, or can you install it further forward or back?

Labroides Posted at 4-13 04:11
Perhaps that was the problem.
Particularly as nothing else (as you described your environment) would have affected GPS reception.
What's the body that you clamp on the drone made of and what's inside it?

The Mavic 3T has two thumb screw mounts for the JZT30 to securely mount to the drone; it's specifically made for that drone.  It does appear, however, that the light is affecting GNSS signal and the time to lock in a home point.  Without the light attached, there was a very quick lock on the home point.