pf2e.fyi
From Pathfinder Lost Omens High Seas, which isn't enabled.

Concealing Currents

FEAT 6
Archetype Marine Marauder

You use currents of water to conceal a projectile, preventing your enemy from predicting its trajectory. If you're in water, creatures that are above you or on land are Off-Guard against your ranged attacks.

Pathfinder Lost Omens High SeasORC