public static function A2af($ndp, $angle, &$sign, array &$idmsf) {
    /* Hours to degrees * radians to turns */
    $F = 15.0 / D2PI;

    /* Scale then use days to h,m,s function. */
    static::D2tf($ndp, $angle * $F, $sign, $idmsf);

    return;
  }