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1. UAV: the eye of the air in coastal defense and frontier defense.Unmanned science and technology: a new boost to coastal defense islands and border defense.Unmanned science and technology: a new boost to coastal defense islands and border defense.

1. UAV: the eye of the air in coastal defense and frontier defense.1. UAV: the eye of the air in coastal defense and frontier defense.Unmanned technology: coastal defense, islands and frontier defense's new help to defend the motherland.

2. Security and confidentiality issues2. Security and confidentiality issues3. Efficient logistics support needs