page_title: Radar configurations and types
section_title: Navigational radars
hierarchical_section_title: Radar configurations and types / Navigational radars
caption_attribution_description: English: Display and control unit of a common maritime navigation and search radar.
context_page_description: Radar configurations and types is an article about listing the different uses of radars.
context_section_description: Navigational radars resemble search radar, but use very short waves that reflect from earth and stone. They are common on commercial ships and long-distance commercial aircraft. 
  Marine radars are used by ships for collision avoidance and navigation purposes.  The frequency band of radar used on most ships is x-band (9 GHz/3 cm), but s-band (3 GHz/10 cm) radar is also installed on most oceangoing ships to provide better detection of ships in rough sea and heavy rain condition. Vessel traffic services also use marine radars (x or s band) for tracking ARPA and provides collision avoidance or traffic regulation of ships in the survallence area. 
  General purpose radars are increasingly being substituted for pure navigational radars. These generally use navigational radar frequencies, but modulate the pulse so the receiver can determine the type of surface of the reflector. The best general-purpose radars distinguish the rain of heavy storms, as well as land and vehicles. Some can superimpose sonar and map data from GPS position.
caption: Surface search radar display commonly found on ships
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