Nah, you don't need an entire navy to take that out, just one of these:
http://en.wikipedia.org/wiki/Lun_class_ekranoplan
Here's what happens:
1. Ekranoplan flys in undetected because of ship's insufficient radars
2. Ekranoplan fires all 6 missiles, banks, and gets the heck out of there at 350mph
3. Ship's CIWS has insufficient directors, so only 1 or 2 can react, take down at most 4 missiles
4. At least one of remaining 2 missiles hits this ship, with a 70% chance of hitting one of the VLS batteries,
5. VLS battery explodes, sets off next battery which explodes, which sets off the next one, ect.
6.
Eventually,
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