/**
 * Classification of an airway by its route structure and intended use.
 *
 * - `VICTOR` - VOR-based low-altitude airway (V1, V16, etc.)
 * - `JET` - Jet route for high-altitude IFR (J1, J60, etc.)
 * - `RNAV_Q` - RNAV Q-route (GPS-based, typically high altitude)
 * - `RNAV_T` - RNAV T-route (GPS-based, typically low altitude)
 * - `GREEN` - Green colored airway (Alaska)
 * - `RED` - Red colored airway (Alaska)
 * - `AMBER` - Amber colored airway
 * - `BLUE` - Blue colored airway
 * - `ATLANTIC` - Atlantic oceanic route
 * - `BAHAMA` - Bahama route
 * - `PACIFIC` - Pacific oceanic route
 * - `PUERTO_RICO` - Puerto Rico route
 */
export type AirwayType = 'VICTOR' | 'JET' | 'RNAV_Q' | 'RNAV_T' | 'GREEN' | 'RED' | 'AMBER' | 'BLUE' | 'ATLANTIC' | 'BAHAMA' | 'PACIFIC' | 'PUERTO_RICO';
/**
 * The full set of {@link AirwayType} values, in declaration order.
 *
 * Use as the single source of truth for value-side iteration (e.g. building a
 * lookup table keyed by airway type) or with {@link isAirwayType} to narrow
 * an external string into the union. The `as const satisfies` brand keeps
 * this array in sync with the type at compile time.
 */
export declare const AIRWAY_TYPES: readonly ["VICTOR", "JET", "RNAV_Q", "RNAV_T", "GREEN", "RED", "AMBER", "BLUE", "ATLANTIC", "BAHAMA", "PACIFIC", "PUERTO_RICO"];
/**
 * Type guard that narrows a string to {@link AirwayType} when it matches a
 * member of {@link AIRWAY_TYPES}.
 *
 * Useful when consuming external strings (URL params, config files, MCP tool
 * inputs) that should be validated before being used as an airway type.
 *
 * @param value - The string to test.
 * @returns `true` if `value` is a valid `AirwayType`.
 */
export declare function isAirwayType(value: string): value is AirwayType;
/**
 * Maps the first character of an AWY.txt airway designation to its AirwayType.
 */
export declare const AWY_TYPE_MAP: Record<string, AirwayType>;
/**
 * Maps the 2-character ATS.txt airway designation prefix to its AirwayType.
 */
export declare const ATS_TYPE_MAP: Record<string, AirwayType>;
/**
 * Regional classification of an airway.
 *
 * - `US` - US Federal airway (contiguous states)
 * - `ALASKA` - Alaska-specific airway
 * - `HAWAII` - Hawaii-specific airway
 */
export type AirwayRegion = 'US' | 'ALASKA' | 'HAWAII';
/**
 * Maps the FAA airway type field character to its AirwayRegion.
 */
export declare const AIRWAY_REGION_MAP: Record<string, AirwayRegion>;
/**
 * Type of navigational reference at an airway waypoint.
 *
 * - `NAVAID` - A radio navigation facility (VOR, VORTAC, NDB, etc.)
 * - `FIX` - A named intersection or reporting point
 * - `WAYPOINT` - A named waypoint (typically RNAV)
 * - `BORDER` - A US border crossing point
 * - `OTHER` - Other point type (unnamed, turning point, etc.)
 */
export type AirwayWaypointType = 'NAVAID' | 'FIX' | 'WAYPOINT' | 'BORDER' | 'OTHER';
/**
 * A single waypoint along an airway route. Waypoints are ordered
 * west-to-east / south-to-north per FAA convention.
 */
export interface AirwayWaypoint {
    /** Waypoint name (navaid name, fix identifier, or descriptive name). */
    name: string;
    /** Waypoint identifier (short code, e.g. "BOS", "MERIT"). May be absent for unnamed points. */
    identifier?: string;
    /** Type of navigational reference at this point. */
    waypointType: AirwayWaypointType;
    /** Navaid facility type when waypointType is NAVAID (e.g. "VORTAC", "VOR/DME"). */
    navaidFacilityType?: string;
    /** Two-letter state code (e.g. "NY", "CA"). */
    state?: string;
    /** ICAO region code for fixes (e.g. "K6", "K7"). */
    icaoRegionCode?: string;
    /** Latitude in decimal degrees, positive north. */
    lat: number;
    /** Longitude in decimal degrees, positive east. */
    lon: number;
    /** ARTCC identifier for this waypoint (e.g. "ZNY", "ZBW"). */
    artccId?: string;
    /** Minimum reception altitude in feet at this point, if published. */
    minimumReceptionAltitudeFt?: number;
    /** Segment MEA (Minimum Enroute Altitude) in feet for the segment starting at this waypoint. */
    minimumEnrouteAltitudeFt?: number;
    /** Direction qualifier for the MEA (e.g. "E BND", "W BND"). */
    minimumEnrouteAltitudeDirection?: string;
    /** MEA in the opposite direction in feet, if different from the primary MEA. */
    minimumEnrouteAltitudeOppositeFt?: number;
    /** Direction qualifier for the opposite MEA. */
    minimumEnrouteAltitudeOppositeDirection?: string;
    /** Maximum authorized altitude (MAA) in feet for this segment. */
    maximumAuthorizedAltitudeFt?: number;
    /** Minimum obstruction clearance altitude (MOCA) in feet for this segment. */
    minimumObstructionClearanceAltitudeFt?: number;
    /** GNSS MEA in feet for this segment, if published. */
    gnssMinimumEnrouteAltitudeFt?: number;
    /** Direction qualifier for the GNSS MEA. */
    gnssMinimumEnrouteAltitudeDirection?: string;
    /** GNSS MEA in the opposite direction in feet. */
    gnssMinimumEnrouteAltitudeOppositeFt?: number;
    /** Direction qualifier for the opposite GNSS MEA. */
    gnssMinimumEnrouteAltitudeOppositeDirection?: string;
    /** Minimum crossing altitude (MCA) in feet at this point. */
    minimumCrossingAltitudeFt?: number;
    /** Direction of the minimum crossing altitude. */
    minimumCrossingAltitudeDirection?: string;
    /** Minimum crossing altitude in the opposite direction. */
    minimumCrossingAltitudeOppositeFt?: number;
    /** Direction for the opposite minimum crossing altitude. */
    minimumCrossingAltitudeOppositeDirection?: string;
    /** Distance in nautical miles from this waypoint to the next waypoint along the airway. */
    distanceToNextNm?: number;
    /** Magnetic course in degrees from this waypoint to the next. */
    magneticCourseDeg?: number;
    /** Magnetic course in degrees in the opposite direction. */
    magneticCourseOppositeDeg?: number;
    /** Distance in nautical miles from this waypoint to the changeover point. */
    changeoverDistanceNm?: number;
    /** Whether there is a gap in navigation signal coverage on this segment. */
    signalGap?: boolean;
    /** Whether altitude data applies only to US airspace on this segment. */
    usAirspaceOnly?: boolean;
    /** Whether this is a dogleg point (a turn point not at a navaid). */
    dogleg?: boolean;
    /** Whether the airway is discontinued at this point (gap flag). */
    discontinued?: boolean;
}
/**
 * A named airway in the US National Airspace System. An airway is a published
 * route defined as an ordered sequence of waypoints (navaids, fixes, and other
 * reference points) with associated altitude restrictions and navigation data.
 *
 * Waypoints are ordered west-to-east / south-to-north per FAA convention.
 */
export interface Airway {
    /** Airway designation (e.g. "V16", "J60", "Q1", "T238", "ATA315"). */
    designation: string;
    /** Classification of the airway by route structure. */
    type: AirwayType;
    /** Regional classification of the airway. */
    region: AirwayRegion;
    /** Ordered sequence of waypoints defining the airway route. */
    waypoints: AirwayWaypoint[];
}
//# sourceMappingURL=airway.d.ts.map