Nope. It's not because you are allowed to drive at age 16, you can drive everywhere at age 16.
Unfortunately there is at the moment no real harmonisation of rules for this in europe.
Some require an icc for almost everything. Other almost nothing.
In france with some type of boat, you can go licence-free. Same for Belgium, except for the vhf (when a boat is equiped with a vhf, you are required to use it and to use it, you need to have a vhf-licence).
Where do you want to go? Sweden is europe and greece is also europe