Why does Wittinghoff think that the Allies are most likely to land in Salerno?

1on the afternoon of September 8, 943, the German reconnaissance plane found a large number of allied ships sailing northward. Although the situation is unknown, Catherine ordered the German troops stationed in Italy to enter the highest level of alert, and ordered the Second Airborne Division in Rome to control the airport just in case. Later, Wittinghoff, commander of the Tenth Army and I studied the next move of the Allied Forces. Kathleen thinks that the Allies may land near Rome, but Wittinghoff thinks that the most likely place for the Allies to land is Salerno, because the Allies will never land in Rome outside the fighter's operational radius. Although the allied landing formation has an aircraft carrier, the take-off and landing of carrier aircraft is greatly affected by the weather and is not reliable. Allies will no longer rely on carrier-based aircraft. Salerno is located at the edge of the operational radius of allied fighters. The best performance Spitfire fighter of the Allies can maneuver in Salerno for 20 minutes under the condition of auxiliary fuel tank, which can provide more effective air cover. In addition, there is Monte Covino Airport 8 kilometers near Salerno, and about 50 kilometers away from Naples, the largest port in southern Italy. After landing, you can quickly obtain a sea and air base.