For an immediate-action Man Overboard emergency on a power-driven vessel in clear daylight conditions, what is the 'Anderson Turn' (Single Turn / Giro simple)?

1. Putting the rudder hard over immediately toward the side the person fell and holding the turn through roughly 250° of heading change, then taking the way off with the casualty fine on the bow
2. Stopping the engine instantly and allowing the boat to drift backward under wind pressure
3. Steering a zig-zag course while reversing at half throttle
4. Making two 90-degree turns to port followed by dropping the anchor