15:17 <queqiao-> ⟨test_account⟩ Well, such problem can also exist. There are two problems in fact: 1) can't know the future "retrograde on red/pink" direction, 2) this direction can somewhat change if the approach is close and the burn is not very short

15:17 <queqiao-> ⟨test_account⟩ +during the burn

15:18 <queqiao-> ⟨lpg⟩ and "inertially fixed" is still a checkbox

15:18 <queqiao-> ⟨test_account⟩ It will fix the maneuver in ECI

15:18 <queqiao-> ⟨test_account⟩ not in red/pink frame

15:19 <queqiao-> ⟨egg⟩ I’m not sure this discussion of the exact nature of the problems encountered when working around a missing feature is a good use of anyone’s time…

15:20 <queqiao-> ⟨lpg⟩ I'm not sure ksp is a good use of anyone's time, but here I am

15:28 <queqiao-> ⟨egg⟩ Hm, this would break: https://github.com/mockingbirdnest/Principia/blob/a4854fc76420eff7cc5646dc067ad25418243f7d/physics/body_centred_body_direction_dynamic_frame_body.hpp#L128

15:30 <queqiao-> ⟨egg⟩ And we don’t keep track of the target anywhere.

15:43 <queqiao-> ⟨egg⟩ The target frame is always a bit messy. What happens when you unset the target, or change it?

15:43 <queqiao-> I guess the flight plan needs to remember the old target?

15:43 <queqiao-> What happens if the target vessel disappears? I guess we have a new flavour of anomalous manœuvre ?