Zg590, NCB-115, Olongapo, Subic Bay 1945. ALAVA DOCK. This picture shows the full length of the prewar seawall of the former Naval Station Olongapo. At the end of that wall, going inland about 100 yards was the location of the infamous tennis court where the Imperial Japanese kept the about 1200 POW survivors of the Oryoku Maru for over a week in Dec. 1944. The POWs were packed in that small place with almost no water, food or medical service!!!!!!!!!!!!!