The lack of adequate capabilities for littoral warfare could cost a blue-water force like the U.S. Navy dearly in a high-intensity conventional war. So might the lack of a sound theory of littoral warfare, operational concepts, and doctrine; these require much effort and time and cannot be produced in a hurry after hostilities start.
"On Littoral Warfare,"
Naval War College Review: Vol. 68
, Article 4.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol68/iss2/4