障碍 发表于 2025-3-30 11:14:12

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legitimate 发表于 2025-3-30 14:46:29

Radar,g on the size and type of ship. They are air-search, fire-control, surface-search, and navigational radars. Often, a single surface-search radar will also perform the function of a separate navigational radar, especially on ships the size of a destroyer and smaller. As an important auxiliary functio
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查看完整版本: Titlebook: Marine Navigation 1 : Piloting; Richard R. Hobbs Book 1981 United States Naval Institute 1981 Marine.bridge.distance.information.instrumen