I have a Gerber which so far has resisted the temptation to go all rusty, despite a couple of dunkings over the last 4 years.
It has 2 blades, one conventional and one scolloped which hold an edge for a reasonable time for stainless, flat nosed pliers with good wire cutters, 1 No.2 pozidrive and 2 flat screwdrivers, a file, a hook thing which I have not found a use for and most important a bottle opener.
All the tools/blades lock open so you cant chop your fingers off too easily.
I never go to sea without it, therefore I have never needed it.
It main claim to fame is helping fix Nashers engine in Cowes.