Titlebook: Marine Navigation 1 : Piloting; Richard R. Hobbs Book 1981 United States Naval Institute 1981 Marine.bridge.distance.information.instrumen

障礙

legitimate

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