I know rocket use at that time for company signals were used between ships and that ships would use rockets when coming into port to signal for tugs ect. But just how common were rockets used at sea? Was it very common like all the time or just occasionally? I'm sure we've all heard the term "Familiarity breeds contempt". I've been guilty of that myself. Was is so common that it would make people of that time complacent? I know this subject has been gone over and over but I've never known if it was an every night type of thing or just once in awhile. I'm sure some of you nautical history guys know this. I would like to know...Thanks.