User blog comment:Void Samukai/Tenelapis/@comment-13235970-20150103051947/@comment-11135771-20150103061322

OOC: Just to note, your submarines will be able to move at full speed in most places once you get the areas fully mapped out. The only reason you're a bit limited now is because it's unknown territory and the water is shallow enough and the terrain irregular enough that going fast could result in hitting something.