Two feet is enough for a tiger shark, they happily chase large fish through the waves to grab a bite.
The most common way to catch a big shark is from the beach, because thats where the fish are. Thats a big hint for survival, change of tide plus dawn and dusk are the big beach fishing times, also prime shark times.
But rgmwa, your on point , if your not in the water you are normally safe. The more people in a area increases the risk. Surfers are particularly at risk as from below the look like a large Tuna, Mulloway etc or dolphin alone or a seal.
Been killed fishing from a boat is also a nasty surprise- recently a game fisherman hunting Marlin in the big Port Stephens competition caught a large Bull shark? On his line and was dragged into the water never to be seen again. I assume the beast turned the tables and lunched on him. I expect that this may be the cause of many a lost fisherman out solo, boat found perfect and sometimes trolling along, no one on board.
A freak accident? No, surprised it doesn't happen more.
I have seen guys in a 12' tinny come in with a 2.5 metre shark onboard and they videoed getting it aboard still alive and thrashing- life may be short for those young fools. Instagram fame can have a very short life.
We call sharks the taxman, they deserve their fair share and essential for a well run ecosystem.
Many a big fish comes up from the deep just a head on the line minus 20 kg of body.
Mother nature does not care how big your game boat is, nor your harbour address. Doesn't give a shit about YouTubers, holiday heroes or even salties like me. Once you enter the salt water, you are at her total mercy.
Beware of entering the liquid jungle, there's Tigers below.