Richthofen's forces quickly established air superiority in the Battle of the Kerch Peninsula, destroying 82 enemy fighters within the first day. Richthofen arrived at his command post as the bombs first fell. He was impressed with the 2,100 sorties flown on 7 May. Inter service communication was facilitated by "Fliegerverbindungsoffizier" (air liaison officers or "Flivos"), specially trained air force officers attached to ground units. They advised the air Corps on the situation and intentions of the ground forces and also advised the army of the best use of air power. This operational style was effective against fixed targets in slow-moving operations, but was more difficult in fast-moving operations such as "Bustard Hunt". The advance meant Richthofen had to keep moving forward. He complained bitterly about the inability of his signals teams to set up new telephone and radio communications quickly enough.