What is craft unloading and how should it be handled?

What is craft unloading and how should it be handled? - Collection of metal chisels with wooden handles and wood cutters for woodwork arranged on shelf on white wall in workshop

What is craft "unloading" due to being farther that the "physics distance" from the "main craft"? What is the best way to deal with it? Can it be avoided?

I only find very sparse information on these subjects. "Unloading" is mentioned in this answer and is this Scott Manley video.

My problem is this: I have a craft with two probe command modules, one for the rocket and one for a rover. I sent it into orbit around a moon (Laythe). I sent the rover down to the surface. I switched to the space center. I switched to the tracking station. To my horror the rover is nowhere to be found, it has disappeared without a trace!

How can I switch away from my rover without it disappearing?

KSP version 0.90.0, Windows 8, career mode.






Pictures about "What is craft unloading and how should it be handled?"

What is craft unloading and how should it be handled? - Awl on working bench in workshop
What is craft unloading and how should it be handled? - Wall with different paintings on cabinet doors with coat of arms in historical style
What is craft unloading and how should it be handled? - Top view composition of professional planer with wooden handles placed on workbench with set of metal knives in carpentry workshop





How are Containers Loaded? | Cargo Operations on Container Ship




Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Ono Kosuki, Meruyert Gonullu, Julia Volk, Ono Kosuki