Under RIPA Rule 6, what is 'Velocidad de Seguridad' (Safe Speed)?

1. A speed that allows a vessel to take proper and effective action to avoid collision and be stopped within a distance appropriate to the prevailing circumstances and conditions
2. A fixed maximum statutory speed of 10 knots in all maritime waters
3. The maximum speed the engine can sustain without overheating the cooling system
4. The minimum speed required to lift a planing hull out of the water