Getting live Navigator is pretty annoying sometimes. They're only present on Terror missions, middle or larger USO's. Artifact site has Navigators too, but you probably will be screw up before even finishing first stage due to MC attacks. Barge... hmm... read my cries few posts early. Shark guys has one as well, but it's hard to kill them and they're shows up too late, usually when aliens builds a bunch of bases. Another problem getting MC reader, which rare too. Without it Sonic weaponry will be blocked and even you managed to get Navigator early and unlock Gauss it's pretty useless against Tasoths, Lobsters and Sharks resist them. All what you have as melee attacks and gas things. By the way guys, remember times when we needs exactly one Magnetic navigation for one Gauss, that was real pain. Oh and MC... too much of it on any difficulty, getting Implants another nightmare. One landed dreadnought gives you two only which will be spend immediately for Bio-lab construction. This is feature of this mod - surviving is priority.