He died due to doing something dangerous.
There are numerous ways this could have been done in a safer way e.g. the pilot ladder could have been deployed on the sea side so he would have fallen in the water, they could have used a drone to read the draft marks, they could have attached a camera to a rope and lowered the camera down to record the draft…
A lot of over the side work involving people is now only allowed with people using proper certified climbing gear like rope access technicians use. Harnesses, helmets and ropes designed for working at high. Certified securing points etc
Unsafe things like going over the side on a rope ladder, bosuns chair or stage are quite rightly banned because the equipment in uncertified and unsafe.