Spain dispatched "Castilla" on 22 January 2010 to aid in relief efforts after the 7.0 magnitude 12 January 2010 Haiti earthquake as part of Operación Hispaniola. The mission was announced on 19 January 2010, with the ship transporting a field hospital, 50 medical officers and 450 troops. Also on board were three helicopters, and several fast boats. "Castilla" left Naval Station Rota on 22 January, carrying 423 troops, and 4 helicopters, headed for Petit-Goâve, Haiti. On 1 February, "Castilla" arrived at San Juan, Puerto Rico to pick up additional supplies. On 4 February, "Castilla" arrived at Petit-Goâve. As of 5 February, landing craft from the ship began disgorging equipment. "Castilla" was expected to remain on-station at Petit-Goâve for three months.