The turrets can only fire in the near depth levels so if you put them on the mountains they have an increased range and effectiveness. This is a great help to your base defense. E Mission briefing are always full of good cheer and a sense of tolerance and compassion that is touching in that deeply personal way. They serve Krispy Kreme doughnuts and hot chocolate. Building a silo next to a metal or corium extractor can cost a little more but it increases your production speed.
Time is the real enemy.
Well time and a whole bunch of submarines. This saves a lot of time you would otherwise spend administering your bases. For the truly lazy the full game assist does everything so you can watch Dobie Gillis reruns and play the game at the same time. Seriously though, the resource assistant will really take the tedium out of the game for those who just want to fight and ship the base management. One limitation of Submarine Titans is the lack of variety of units.