During World War II, Biuku Gasa and Eroni Kumana were tasked with patrolling the waters of the Solomon Sea near Gizo with Australian coastwatcher Sub-Lieutenant Arthur Reginald Evans, who manned a secret observation post at the top of Kolombangara island's Mount Veve volcano.
In World War II, targets found through cryptanalysis of radio communication, were attacked only if there had been aerial reconnaissance in the area, or, in the case of the shootdown of Admiral Isoroku Yamamoto, where the sighting could be attributed to the Coastwatchers.
Australian coastwatcher, Sub Lieutenant Arthur Reginald Evans, who manned a secret observation post at the top of the island's Mount Veve volcano, spotted the explosion.