chimbu...I guess that depends on ones personal abilitys....your statement could apply to many types of aircraft and operations and that is precisely my point.....
Have several years doing crop dusting/topdressing myself,and with out having to ask the question ,it seemed obvious to me to go find the training,as with the float plane rating I went and got the the training,as with my type ratings,.....had to go get the training...am I painting a picture here?????......