Mezue ahịrịokwu na-esonụ: Site na ngwụsị afọ ndị 1930, na iyi egwu agha na-abịanụ na Japan na Pacific, a na-ahụkwa telecommunications ọzọ dị ka ihe dị mkpa nke nchebe mba. Ọbụna tupu Australia kwupụta agha na Japan na 9 Disemba 1941, (mgbe ndị Japan wakporo Hawaii, Hong Kong na
Malaya), enwere mmasị dị mkpa n'ịkwalite ụlọ ọrụ nchekwa na Cape York Peninsula. Ihe abụọ a na-ebute ụzọ bụ ọdụ ụgbọelu ndị nwere ike ịrụ ọrụ na nkwukọrịta zuru oke. Ka ọ na-erule ọnwa Julaị afọ 1941, a rụchara ọdụ ụgbọelu ọhụrụ dị n'ebe ugwu nke Coen, na ọdụ ụgbọ elu ọhụrụ na Iron Range (n'akụkụ Osimiri Lockhart), mana n'oge a, Coen Telegraph Station nwere naanị ụlọ ọrụ morse na akara akara pyramid 6-line (naanị ekwentị mpaghara).