How quickly could Navajo Code Talkers transmit a message compared to decoder machines?

The transmission speed of Navajo Code Talkers was markedly faster than that of decoder machines, which is one of the significant advantages that the Navajo Code Talkers offered during World War II. The correct answer indicates that they could transmit a message in 20 seconds, while decoder machines would take about 30 minutes. This speed advantage played a critical role in military operations, especially during times when rapid communication was essential for effective strategy and troop movements.

Navajo Code Talkers used a sophisticated yet simple method of encoding messages based on the Navajo language, which was both complex and unwritten at the time, making it nearly impossible for enemy forces to decipher. The ability to transmit messages in a matter of seconds allowed for timely decision-making and real-time communication on the battlefield, greatly enhancing operational effectiveness.

The time frames given in the other choices do not accurately reflect the historical performance of the Navajo Code Talkers in relation to decoder machines, where the actual advantage in speed was one of the critical factors in their effectiveness.