"navigational chart" meaning in English

{
  "forms": [
    {
      "form": "navigational charts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "navigational chart (plural navigational charts)",
      "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",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nautical",
          "orig": "en:Nautical",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of nautical chart (“maritime map showing characteristics which are relevant for seafarers”)"
      ],
      "id": "en-navigational_chart-en-noun-~4LD~qkI",
      "links": [
        [
          "nautical",
          "nautical"
        ],
        [
          "nautical chart",
          "nautical chart#English"
        ]
      ],
      "raw_glosses": [
        "(nautical) Synonym of nautical chart (“maritime map showing characteristics which are relevant for seafarers”)"
      ],
      "synonyms": [
        {
          "extra": "maritime map showing characteristics which are relevant for seafarers",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "nautical chart"
        }
      ],
      "topics": [
        "nautical",
        "transport"
      ]
    }
  ],
  "word": "navigational chart"
}

{
  "forms": [
    {
      "form": "navigational charts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "navigational chart (plural navigational charts)",
      "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",
        "en:Nautical"
      ],
      "glosses": [
        "Synonym of nautical chart (“maritime map showing characteristics which are relevant for seafarers”)"
      ],
      "links": [
        [
          "nautical",
          "nautical"
        ],
        [
          "nautical chart",
          "nautical chart#English"
        ]
      ],
      "raw_glosses": [
        "(nautical) Synonym of nautical chart (“maritime map showing characteristics which are relevant for seafarers”)"
      ],
      "synonyms": [
        {
          "extra": "maritime map showing characteristics which are relevant for seafarers",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "nautical chart"
        }
      ],
      "topics": [
        "nautical",
        "transport"
      ]
    }
  ],
  "word": "navigational chart"
}