Hi, I'm fairly new to KSP (been playing about a month now) and am still learning some things. One thing I am particularly struggling with is navigation... in practice at least. Having watched Scott Manley's video on navigating between planets I felt like I've got a good grasp on it. Using the online calculator and manoeuvre nodes I managed to get a distant encounter, but it took a lot of effort. So I started trying mods (Protractor, Kerbal Engineer Redux, MechJeb and Kerbal Alarm Clock) that will make it easier, but after many tests over the last few weeks, I've been left with more questions than answers... 1) The Protractor mod gives two angles that are "countdowns" and as in Scott's videos this makes sense. One is the angle of Kerbin relevant to the target planet, the other is the angle during my orbit that I need to begin the burn to escape and basically I ideally wait for them to both be 0'. I have used this in conjunction with the manoeuvre nodes and can get an encounter (albeit not a close one, but I could correct it during the journey). So today I gave Kerbal Engineer a go after noticing that it seems to show the same information, plus loads more. In Kerbal Engineer, I can see the "Intercept Angle" nearly matches up with the first value in Protractor (it is out by a degree). However, I can't see any angle that "matches" with the second angle in Protractor, including the one labelled "Ejection Angle". Why are these values different? What am I not understanding? And what are the other angles displayed in Kerbal Engineer used for? 2) Kerbal Alarm Clock has a feature for adding alarms for transfer windows, which I used in a game a week ago. When the alarm eventually went off, Protractor was showing that I was 2'+ past the point at which I should transfer (even with several hours advance warning set on the alarm). Why was there such a difference? And does it matter? 3) Is there a way to find out how much TWR or Delta-V I'll need at various stages of a mission other than trial and error? Or is that like asking how long a piece of string is? Loads of mods can tell me what those values currently are (and what they'd be on other planets), but nothing tells me what I need to get into orbit, or get from Kerbin to the Mun, or perform a transfer from Kerbin to Eve. Trial and error doesn't bother me so much with the short hops I've been doing so far, but I'd hate to do a mission to Jool, only to get swallowed up because I under-guesstimated the amount of fuel required to achieve orbit. 4) In MechJeb 2 is there a way to get it to display the angles needed for navigation in the same way that Protractor/Kerbal Engineer do (counting down)? Thanks