how to convince father to let me take boat out?

anybody out there that has parents that let them take the boat out. if so i need you tips on how to convince them to let me take the boat. All i want to do is to take the boat out with a few friends without him, dont i deserve a chance? When we go camping he lets me take it once or twice with cousins for a few hours on the lake, but not to the river. Boating since i was born, have a boating saftey certificate since i was 13, never been in anykind of trouble or done anything real stupid, lot more expierince than some of the people out there, and being a better driver than him (says other passengers) isnt enough, i need more ways to persuade him to allow me the oppertunity.