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  "path": "/2026/04/12/passive-radar-explained/",
  "publishedAt": "2026-04-12T08:00:00.000Z",
  "site": "https://hackaday.com",
  "tags": [
    "Radio Hacks",
    "passive radar",
    "radar",
    "…read more"
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  "textContent": "It is an old trope in submarine movies. A sonar operator strains to hear things in the ocean but dares not “ping” for fear of giving away the boat’s location. …read more",
  "title": "Passive Radar Explained"
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