I've searched Google and found conflicting info on having a pocket knife along. I don't have a set dive knife so I plan to take my Spyderco Pacific Salt, which is just under a 4" folding blade. It doesn't rust and I've been carrying one for about five years in and out of the salt water.

I like to have a knife on me while I am aboard a boat, but don't plan on taking it ashore or when I go out to the bars. Would I have any problem brining it in to the BVI on the ferry when it is packed away with my leatherman and filet knife in my luggage?