enblethen wrote:
Double check the galley area for another GFCI receptacle
If you paid $25 for a single pole breaker, you got ripped off! There is nothing special about RV breakers!
Those are Eaton BD1515 Duplex or "twin" breakers, and are two breakers built into one full size housing.

Allows one to add more circuits to the breaker box than single full size breakers would have allowed. Works in boxes not designed for half size breakers.
They are more expensive than if you used a single full size breaker and $25 is not out of line..
Same one is selling for $22.63 at Amazon
HERE, add in taxes and possibly shipping it would be right around $25..
Nothing special about that breaker, it is not a GFCI breaker and somewhere down the wiring line there is most likely a GFCI since the panel label mentions it..