Do I Need Anode For My Boat What Sort Of Sacrificial Anodes Do I Need For My Boat Hull?

What sort of sacrificial anodes do I need for my boat hull? - do i need anode for my boat

I have a 45-foot boat PRAM and I had the silver helmet again. This is a houseboat in the static part of the sea and fresh water. What type of anodes to be? The size, material, in the case of bolting or welding? Help! Thank you:)