Japanese Coast Guard teams had spotted Ban during a helicopterpatrol over debris fields nearly two kilometers off shore.
日本海岸对队员在一次直升机巡逻时在离海岸2千米的瓦砾区域上空发现了ban。
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There were evenings when they reached their rendezvous and then had to walk past one another without a sign, because a patrol had just come round the corner or a helicopter was hovering overhead.
One Z-9 patrolhelicopter that took off from a Chinese frigate flew near Miyako Island, prompting the scrambling of Japanese jet fighters, said the Japanese Defense Ministry.