Source：NARA via Fold3.com
上面與底下這兩張美軍在1944年3月發佈的空中偵察照片都是關於高雄岡山飛行場上的設施。上面這張照片的說明指出這些有浪板狀屋頂的棚廠位於岡山飛行場，設在此地的飛機製造廠（即日本海軍第六十一廠）製造完成的飛機利用這裡做為起飛準備的位置。下面照片的說明則指出這些岡山飛行場上狀似七弦琴（lyre）的露天機堡可停放三架戰鬥機。
The above photo and the one immediately below were used in the March 1944 issue of “Impact” (which was probably an internal publication for the US military). The first photo was captioned “[s]aw-toothed roof hangar shops at Okayama, major base on Formosa, north of Takao. An aircraft assembly plant makes this a fly-away point as well as a staging area.” The caption for the photo below reads “[l]yre-shaped revetments at Okayama, Formosa holds three fighters each.”
Source：NARA via Fold3.com
1944年8月25日，美軍的飛機再度飛臨岡山上空偵察。美軍的情報部門利用當天拍攝的照片對岡山飛行場研究了一番，並在照片上做了註解（如下圖）。第一張照片裡的浪板屋頂棚廠就位在註明EAST HANGAR & ADMIN. AREA的黑色直線所指之處，而第二張照片的露天機堡則是在TARGET AREA NO. 2 OKAYAMA AIRDROME這些字的”2″附近。On August 25, 1944, American reconnaissance aircraft photographed Okayama Airdrome again. The annotated photo was shown below. The saw-tooth roofed hangars in the top photo can be seen at the end of the black line with the text “EAST HANGAR & ADMIN. AREA”, while the lyre-shaped revetments are near the “2” in “TARGET AREA NO. 2 OKAYAMA AIRDROME”.
Source：NARA via Fold3.com
Source：Google Earth
美軍正策劃一次大規模的轟炸行動，主角是當時載彈量最大的B-29重型轟炸機。
The Americans were planning a major bombing campaign by the very heavy B-29 bomber.