Reconnaissance denial protected convoys and Ultra

The early catapult and carrier systems often attacked the enemy's ability to find a convoy rather than the submarines that would strike it. A Focke-Wulf Condor could report a convoy's position and allow U-boats to assemble a wolf pack; denying that contact interrupted the attack before it formed. MAC ships and escort carriers later added anti-submarine patrols, but reconnaissance denial remained a central task. The interceptions also protected intelligence security. When German search aircraft failed to return or reported being chased away, commanders had a convincing operational reason for losing contact with a convoy. That explanation helped conceal the contribution of Ultra decryption and traffic analysis, because German officers did not need to infer that their communications had been compromised.