On 2 September, the U.S. Marine 3rd Defense Battalion began operating an air search radar at Henderson Field, which, along with reports from the coastwatchers, helped provide early warning of incoming Japanese warplanes.
Den 2. september begyndte marinekorpsets 3. forsvarsbataljon at drive en radarstation på Henderson Field, som sammen med meldinger fra kystobservatørerne hjalp til at give forvarsel om japanske fly i anflyvning.