/**
 * Usage category of a fix as classified by the FAA.
 *
 * - `WP` - Waypoint
 * - `RP` - Reporting Point
 * - `MW` - Military Waypoint
 * - `MR` - Military Reporting Point
 * - `CN` - Computer Navigation Fix (internal FAA automation point)
 * - `VFR` - VFR Waypoint
 * - `NRS` - NRS Waypoint
 * - `RADAR` - Radar fix
 */
export type FixUseCode = 'WP' | 'RP' | 'MW' | 'MR' | 'CN' | 'VFR' | 'NRS' | 'RADAR';
/**
 * The full set of {@link FixUseCode} values, in declaration order.
 *
 * Use as the single source of truth for value-side iteration (e.g. building a
 * lookup table keyed by use code) or with {@link isFixUseCode} 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 FIX_USE_CODES: readonly ["WP", "RP", "MW", "MR", "CN", "VFR", "NRS", "RADAR"];
/**
 * Type guard that narrows a string to {@link FixUseCode} when it matches a
 * member of {@link FIX_USE_CODES}.
 *
 * Useful when consuming external strings (URL params, config files, MCP tool
 * inputs) that should be validated before being used as a fix use code.
 *
 * @param value - The string to test.
 * @returns `true` if `value` is a valid `FixUseCode`.
 */
export declare function isFixUseCode(value: string): value is FixUseCode;
/**
 * Maps FAA FIX_USE_CODE values from NASR data to FixUseCode.
 * FAA values may have trailing whitespace so trimmed values are mapped here.
 */
export declare const FIX_USE_CODE_MAP: Record<string, FixUseCode>;
/**
 * Compulsory reporting designation for a fix.
 *
 * - `HIGH` - Compulsory at high altitude
 * - `LOW` - Compulsory at low altitude
 * - `LOW/HIGH` - Compulsory at both low and high altitude
 */
export type FixCompulsory = 'HIGH' | 'LOW' | 'LOW/HIGH';
/**
 * Maps FAA COMPULSORY values from NASR data to FixCompulsory.
 */
export declare const FIX_COMPULSORY_MAP: Record<string, FixCompulsory>;
/**
 * A navigational aid association for a fix, indicating the bearing and
 * distance from a nearby navaid to the fix position.
 */
export interface FixNavaidAssociation {
    /** Navaid identifier (e.g. "PDK", "BOS"). */
    navaidId: string;
    /** Navaid facility type (e.g. "VOR", "VORTAC", "LOC", "NDB"). */
    navaidType: string;
    /** Bearing in degrees from the navaid to the fix. */
    bearingDeg: number;
    /** DME distance in nautical miles from the navaid to the fix. */
    distanceNm: number;
}
/**
 * A named fix or waypoint published by the FAA. Includes US fixes and
 * selected foreign fixes (Canadian, Mexican, Caribbean, Pacific) that
 * participate in US operations.
 * Fixes are specific geographic positions used in flight planning, instrument
 * procedures, and ATC operations. They are defined by geographic coordinates
 * and may be associated with one or more navaids via radial/distance intersections.
 */
export interface Fix {
    /** Fix identifier (e.g. "MERIT", "BOSCO", "AAALL"). */
    identifier: string;
    /** ICAO region code (e.g. "K6", "K7", "K1"). */
    icaoRegionCode: string;
    /** Two-letter state code (e.g. "MA", "NY", "CA"). Absent for non-US fixes. */
    state?: string;
    /** Two-letter country code (e.g. "US"). */
    country: string;
    /** Latitude in decimal degrees, positive north. */
    lat: number;
    /** Longitude in decimal degrees, positive east. */
    lon: number;
    /** Usage category of the fix. */
    useCode: FixUseCode;
    /** High-altitude ARTCC identifier (e.g. "ZNY", "ZBW"). */
    highArtccId?: string;
    /** Low-altitude ARTCC identifier (e.g. "ZNY", "ZBW"). */
    lowArtccId?: string;
    /** Whether this fix has a pitch designation. */
    pitch: boolean;
    /** Whether this fix has a catch designation. */
    catch: boolean;
    /** Whether this fix is associated with Special Use Airspace or an ATCAA. */
    suaAtcaa: boolean;
    /** Minimum reception altitude in feet, if published. */
    minimumReceptionAltitudeFt?: number;
    /** Compulsory reporting designation, if applicable. */
    compulsory?: FixCompulsory;
    /** Previous fix identifier, if the fix was renamed. */
    previousIdentifier?: string;
    /** Charting remark text, if any. */
    chartingRemark?: string;
    /** Chart types on which this fix appears (e.g. "IAP", "STAR", "ENROUTE LOW"). */
    chartTypes: string[];
    /** Navaid associations defining the fix by radial/distance from nearby navaids. */
    navaidAssociations: FixNavaidAssociation[];
}
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