Lowering benthoscope test lights, Velero IV, 1949

Three men including Captain Allan Hancock look on as experimental benthoscope lights are lowered from the Velero IV prior to diving, Emerald Bay, Santa Catalina Island, Channel Islands, California, USA, 1949 October.

1949年10月，美国加利福尼亚州海峡群岛圣卡塔利娜岛翡翠湾，包括艾伦·汉考克船长（Captain Allan Hancock）在内的三名男子在一旁注视，实验用海底观测灯（experimental benthoscope lights）正于潜水作业前从"阿尔韦罗四号（Velero IV）"船上下放。