What fledging technology was ignored prior to the attack on pearly harbor why was it ignored?

Prior to the attack on Pearl Harbor, the fledgling technology of radar was largely ignored by military leaders in the United States. Despite its potential for early warning and surveillance, radar was not fully integrated into defense strategies due to a combination of skepticism about its reliability, limited understanding of its capabilities, and a focus on more traditional military technologies. Consequently, the failure to prioritize radar contributed to the surprise of the Japanese attack on December 7, 1941.