That still better than the 1 in 1000 (or much worse) by land.
However, I am not talking about drug smuggling, where the boats can be small, but people smuggling.
I am talking about people smuggling.
The interdiction rate for druggies is even lower.
The Coast Guard's take is pretty simple: if a majority of immigrant smuggling moves to the water, the Coast Guard is not going to be any more successful than the Border Patrol.