The Gulf Stream is the fastest ocean current in the world with peak velocities near 2m/s.
Source: marine.coastal.edu
What about deep currents, North Atlantic Deep Water, Antarctic Bottom Water, etc?
What is the fastest ocean deep current?
My guess is Antarctic Bottom Water must be the fastest because Antarctic Circumpolar Current receives not salty water from ice melt, and salinity gradient moves deep currents.
Is Antarctica Bottom Water the fastest?