Safety gear is important, but depends where and how you are going to sail. I carry much safety gear, but I sail often over 5 miles from shore in Hawaii where a mishap could send me on my way to Tahiti! Where are you planning on sailing, what type of waters (river/lake/ocean) and how far from land?
im wanting to fish well offshore in South Australia, between 5-10km out. i will have a sounder gps combo, flares, radio, pfd, shark shield etc etc. its possible that ill be fishing alone coz where i wanna fish, it is highly likely to encounter great white sharks and not too many of my mates are too keen lol