Sorry dont have any better pics of there gear (this was the best pic i was able to snap on ship) but here is what they normaly will use gearwise.
C7
C8
MP5
870
Sig
C9s are used but they never bring them on ship, they are mainly used for covering the deck, Every one of theres that i have ever seen looks shiny new.
normally there entry and security teams will be wearing protecs and the follow up search teams will be wearing ball caps, this of course totally comes down to the situation and what the weather is like, there helmets are to protect them from hitting there head rather then ballistic protection.
There vests are normally Blackhawks