"crash boat" meaning in English

{
  "forms": [
    {
      "form": "crash boats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crash boat (plural crash boats)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
        },
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
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          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Watercraft",
          "orig": "en:Watercraft",
          "parents": [
            "Nautical",
            "Vehicles",
            "Transport",
            "Machines",
            "All topics",
            "Technology",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A wooden speedboat used to rescue the crew of downed aircraft, chiefly in World War Two."
      ],
      "id": "en-crash_boat-en-noun-Lo1Gm4yd",
      "links": [
        [
          "wooden",
          "wooden"
        ],
        [
          "speedboat",
          "speedboat"
        ],
        [
          "aircraft",
          "aircraft"
        ],
        [
          "World War Two",
          "World War Two"
        ]
      ],
      "raw_glosses": [
        "(historical) A wooden speedboat used to rescue the crew of downed aircraft, chiefly in World War Two."
      ],
      "tags": [
        "historical"
      ],
      "wikipedia": [
        "Crash boats of World War 2"
      ]
    }
  ],
  "word": "crash boat"
}

{
  "forms": [
    {
      "form": "crash boats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crash boat (plural crash boats)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with historical senses",
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        "Pages with entries",
        "en:Watercraft"
      ],
      "glosses": [
        "A wooden speedboat used to rescue the crew of downed aircraft, chiefly in World War Two."
      ],
      "links": [
        [
          "wooden",
          "wooden"
        ],
        [
          "speedboat",
          "speedboat"
        ],
        [
          "aircraft",
          "aircraft"
        ],
        [
          "World War Two",
          "World War Two"
        ]
      ],
      "raw_glosses": [
        "(historical) A wooden speedboat used to rescue the crew of downed aircraft, chiefly in World War Two."
      ],
      "tags": [
        "historical"
      ],
      "wikipedia": [
        "Crash boats of World War 2"
      ]
    }
  ],
  "word": "crash boat"
}