SD radar
id:
sd-radar-255-9894479
title:
SD radar
text:
The SD radar was an early form of radar developed by the United States Naval Research Laboratory between 1940 and 1941. It was installed on submarines to provide warning of enemy aircraft. Its omnidirectional antenna, however, prevented it from being able to provide bearing information, and it was used as a proximity radar. Its range was directly affected by the aircraft's size and altitude. Large aircraft with an altitude above 1000 feet AGL could be detected between twelve and twenty miles, an
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/SD_radar
date created:
date modified:
2022-11-11T12:30:01Z
main entity:
{"identifier":"Q107675507","url":"https://www.wikidata.org/entity/Q107675507"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/5/59/USS_Sculpin_%28SS-191%29_NH_97305.jpg","width":1051,"height":1280}
fields total:
13
integrity:
14