"Unchartered waters" means navigating into an unfamiliar or unfamiliar territory or situation where there is no previous knowledge or experience to guide you. Full definition
Or, perhaps the challenge and mystery of swimming in unchartered waters builds up even more anticipation. (findnewpassion.com)
«Many of us are recognizing that we are collectively moving through unchartered waters of awakening. (josephaldo.com)
«But his solution is so outrageous that he's going to put our state into unchartered waters because of a few irresponsible and reckless senators on the other side of the aisle... I think it's political opportunism and it's dangerous.» (nystateofpolitics.com)