I know how to solve our 'Port" problem, you have all your boats meet some 5 miles out in sea at a "Sea Port" (or further, not sure about that range) then have a massive cargo transport (using oil rig technology)
the outside ships HAVE to port there, then trasfer their cargo to a "runner" ship, which only moves from harbor to the "Sea Port". This will give us time to inspect almost all the cargo, and the Coast Guard can blow away any run away ships within that time frame.
the outside ships HAVE to port there, then trasfer their cargo to a "runner" ship, which only moves from harbor to the "Sea Port". This will give us time to inspect almost all the cargo, and the Coast Guard can blow away any run away ships within that time frame.