The US navy, which has long mounted the old M2 .50 against just such smaal boat raids as that which nearly sunk the U.S.S. Cole has rethunk their position about such things, concerned about, among other things, collateral damage.
Armament Systems Branch Fields New Gun System on Deploying Ships
CRANE, In -- Naval Surface Warfare Center, (NSWC) Crane was tasked by NAVSEA (PMS NSW) in direct support of Chief of Naval Operations' (N764) Operation Task Force Hip Pocket to install additional small arms weapons on deploying ships for force protection. The directive to provide MK44 systems to several ships scheduled for near-term deployment was received late last year and in less than 45 days, 56 systems were procured, assembled, inspected, and delivered to the Truman Battle Group (BG) ships in Norfolk and the Nimitz BG in San Diego.
As I understand it, though, the Cole crew was not standing to their guns and the guns weren't even loaded, so it wouldn't really matter if they had a 7.62 Gatling, a Ma Deuce, or a Red Ryder BB gun . . . .
We carried a couple of those my last deployment but didn’t have them out very much. The gunner’s mates said they were far more susceptible to corrosion in the salt air than the old standby twin .50 cals we also carried.