The Frozen Wave Satsuma is an OSRIC module designed for 6-8 adventures of levels 3-5.
A bank of frigid fog rolls down the northern coasts, bringing seaborne raiders sacking villages and temples along the way. Survivors wail of strange-speaking men in stranger armor, wielding weapons unseen in civilized lands. All know that the fog must hide a larger ship of some equally strange design, for the raiders strike from small boats which would surely capsize in the open seas.
What dangers await upon the cold and windy ocean? What terrible foreign ship lurks within the haze, hiding like a lion upon the wine-dark sea? Into this fog travels the intrepid party - seeking to solve the mystery of The Frozen Wave Satsuma!