Swimming as a feat
Dice Pool: [Stamina + Athletics]
Discussion: Assuming your character can swim at all (being able to do so requires one dot of Athletics), long-distance or long-duration swimming requires successful swimming rolls versus a difficulty determined by water conditions. After all, although vampires can’t drown, they are corpses and thus have little buoyancy. The first roll is necessary only after the first hour of sustained activity, and only one success is needed. If a roll fails, the character loses ground — perhaps pulled out of her way by a current. If a roll botches, she starts to sink, or might even be hit by a heedless motorboat.
Vampires caught in shallow water during the day will take damage from sunlight (assume that a submerged vampire has protection equivalent to being under cloud cover).
See the Skill: Swimming