{
  "paths": {
    "/signalk/v1/api/vessels/self/navigation/racing/setStartLine": {
      "put": {
        "summary": "Set or Adjust Start Line End",
        "description": "Set or adjust the port/stb end of the line. Provide `end`, optionally `position`, `delta`, and/or `rotate`.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "end": { "type": "string", "enum": ["port", "stb"] },"position": {
                    "oneOf": [
                      { "type": "string", "enum": ["bow"] },
                      {
                        "type": "object",
                        "properties": {
                          "latitude": { "type": "number" },
                          "longitude": { "type": "number" }
                        },
                        "required": ["latitude", "longitude"]
                      }
                    ],
                    "description": "Either the string 'bow', or an object with latitude/longitude"
                  },
                  "delta": { "type": "number", "description": "Distance in meters to move the end along line bearing" },
                  "rotate": { "type": "number", "description": "Angle in radians to rotate end around the opposite end" }
                },
                "required": ["end"]
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Start line modified"
          }
        }
      }
    },
    "/signalk/v1/api/vessels/self/navigation/racing/setStartTime": {
      "put": {
        "summary": "Set, Adjust or Command the Timer",
        "description": "Set start time or send commands to the timer ('start', 'reset', 'sync', or 'adjust').",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "command": {
                    "type": "string",
                    "enum": ["start", "reset", "sync", "adjust", "set"]
                  },
                  "delta": { "type": "number", "description": "Time offset in seconds (for adjust)" },
                  "startTime": { "type": "string", "format": "date-time", "description": "ISO start time (for set)" }
                },
                "required": ["command"]
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Timer command executed"
          }
        }
      }
    }
  }
}