Reproduction Steps: Go diving, around 3pm come up from diving and the noise will start - much louder than its playing here, and while I wasn't able to get a screenshot of it, the boat is across the pier.
Go to bed, start the new day, the noise continues but more muted. this is the first its persisted beyond starting a new day, previous times its cut once starting a new day.
The noise is constant - it doesn't matter where you are, if you're in a cutscene, if you're indoors. no matter where you are on the island you can hear this.
Repro Rate: 50/50 - some days it doesn't happen, it's connected to either this boat or the travelling merchant. haven't worked it out yet.
Game Platform: PC, Steam
Game Version: 1.1b-1237
I'm trying to find my save files, once I locate them I'll add them here
