I am not worried.
If CWIS can hit a missle inbound at Mach 3, it can hit a speedboat 100+ times the size of that missle traveling at 70 knots.
This is not to minimize the danger of being hit with an explosives laden boat, but our crews will be on the lookout, so this won’t be a surprise, and a few of those 20mm shells crashing into the piles of explosives might make driving the boat a risky proposition.
That’s assuming that our crews will be allowed to use them. :(