USS Proteus naval badge on old aluminum boat?

[mofo83]

Just picked up an old aluminum boat (50's? 60's?) and while searching for signs of what brand it might be, I noticed a small metal "badge" attached to the rear of the boat. It's paint was pretty faded, but I could make out a motto on it, and after doing a little research, found what I think is the exact same design on a patch (on eBay):



I'm assuming the owner must have been assigned to the USS Proteus, was given a small commemorative badge of some sort, and attached it to his boat? Was this something navy guys used to do, commonly?

Just curious.

Thanks

 

[StingrayMike]

Not very common, but it has been done.
I served in the Submarine Force for 23 yrs, I fly the "silver dolphin" flag from my stern.
just something different to show my pride