{
  "dataset": "semaphore-flags",
  "title": "Flag semaphore",
  "version": "1.0.0",
  "updated": "2026-07-02",
  "source": {
    "name": "International Code of Signals, flag semaphore",
    "url": "https://msi.nga.mil/Publications/ICOS"
  },
  "checkedAt": null,
  "license": "CC BY 4.0",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "Data from quickref.tips",
  "documentation": "https://quickref.tips/reference/semaphore-flags",
  "recordCount": 26,
  "data": [
    {
      "letter": "A",
      "left_arm": "Down (7:30)",
      "right_arm": "Side down"
    },
    {
      "letter": "B",
      "left_arm": "Left (9:00)",
      "right_arm": "Side down"
    },
    {
      "letter": "C",
      "left_arm": "Up (10:30)",
      "right_arm": "Side down"
    },
    {
      "letter": "D",
      "left_arm": "Straight up",
      "right_arm": "Side down"
    },
    {
      "letter": "E",
      "left_arm": "Side down",
      "right_arm": "Up (1:30)"
    },
    {
      "letter": "F",
      "left_arm": "Side down",
      "right_arm": "Right (3:00)"
    },
    {
      "letter": "G",
      "left_arm": "Side down",
      "right_arm": "Down (4:30)"
    },
    {
      "letter": "H",
      "left_arm": "Left (9:00)",
      "right_arm": "Down (7:30)"
    },
    {
      "letter": "I",
      "left_arm": "Up (10:30)",
      "right_arm": "Down (7:30)"
    },
    {
      "letter": "J",
      "left_arm": "Straight up",
      "right_arm": "Right (3:00)"
    },
    {
      "letter": "K",
      "left_arm": "Straight up",
      "right_arm": "Down (7:30)"
    },
    {
      "letter": "L",
      "left_arm": "Down (7:30)",
      "right_arm": "Up (1:30)"
    },
    {
      "letter": "M",
      "left_arm": "Down (7:30)",
      "right_arm": "Right (3:00)"
    },
    {
      "letter": "N",
      "left_arm": "Down (7:30)",
      "right_arm": "Down (4:30)"
    },
    {
      "letter": "O",
      "left_arm": "Left (9:00)",
      "right_arm": "Up (10:30)"
    },
    {
      "letter": "P",
      "left_arm": "Straight up",
      "right_arm": "Left (9:00)"
    },
    {
      "letter": "Q",
      "left_arm": "Left (9:00)",
      "right_arm": "Up (1:30)"
    },
    {
      "letter": "R",
      "left_arm": "Left (9:00)",
      "right_arm": "Right (3:00)"
    },
    {
      "letter": "S",
      "left_arm": "Left (9:00)",
      "right_arm": "Down (4:30)"
    },
    {
      "letter": "T",
      "left_arm": "Up (10:30)",
      "right_arm": "Straight up"
    },
    {
      "letter": "U",
      "left_arm": "Up (10:30)",
      "right_arm": "Up (1:30)"
    },
    {
      "letter": "V",
      "left_arm": "Straight up",
      "right_arm": "Down (4:30)"
    },
    {
      "letter": "W",
      "left_arm": "Right (3:00)",
      "right_arm": "Up (1:30)"
    },
    {
      "letter": "X",
      "left_arm": "Down (4:30)",
      "right_arm": "Up (1:30)"
    },
    {
      "letter": "Y",
      "left_arm": "Up (10:30)",
      "right_arm": "Right (3:00)"
    },
    {
      "letter": "Z",
      "left_arm": "Down (4:30)",
      "right_arm": "Right (3:00)"
    }
  ]
}