> ## Documentation Index
> Fetch the complete documentation index at: https://www.narev.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Runway 16R ILS Category II and special authorization

> Runway 16R ILS Category II and special authorization.

## Approach setup and route

Tune **IKS ILS/DME, 109.5 MHz**, and follow final course **155°**. Special-authorization Category I requires **DME or GNSS**. Category II and special-authorization Category II require **DME**.

The initial profile altitude is **3,000 ft**. **URDEN** is at **11.4 IKS DME / 11.2 NM from the threshold**. During PRM operations, expect to intercept the localizer **at least 6 NM before URDEN, at 3,000 ft**.

Follow the **3° glidepath** through **IGALA**, at **5.3 IKS DME / 5.2 NM from the threshold**, at a path altitude of **1,700 ft**. Those distance pairs are reproduced as printed. Reference datum height is **52 ft**.

**Aircraft near taxiway A1 can cause false glidepath indications.**

## Speeds and holding

Cross **URDEN at no more than 185 kt indicated airspeed** and **IGALA at no less than 150 kt**. ATC approach speed ranges are **160–185 kt at URDEN** and **150–160 kt at IGALA**. Holding is as advised by ATC.

## Descent checks

The following altitudes are on the **3° glidepath**, with distances referenced to **IKS DME**.

| DME distance | Path altitude |
| - | - |
| 9.4 NM | 3,000 ft |
| 9 NM | 2,870 ft |
| 8 NM | 2,560 ft |
| 7 NM | 2,240 ft |
| 6 NM | 1,920 ft |
| 5.3 NM | 1,700 ft |
| 5 NM | 1,600 ft |
| 4 NM | 1,280 ft |
| 3 NM | 960 ft |
| 2 NM | 640 ft |
| 1 NM | 330 ft |

## Minima

These minima apply to categories **A, B, C and D/DL**. **RA** is the radio-altimeter value; **DA** is barometric decision altitude. Heights are above threshold; runway visual range (**RVR**) is in metres.

| Authorization | RA | DA | Height | RVR |
| - | - | - | - | - |
| Category II | 101 ft | 107 ft | 100 ft | 300 m |
| Special authorization Category II | 101 ft | 107 ft | 100 ft | 350 m for A, B and C; 400 m for D |
| Special authorization Category I | 148 ft | 157 ft | 150 ft | 450 m |

## Missed approach

Track **155°**. At **600 ft**, turn **right** onto track **170°**. Climb to **3,000 ft**, or as directed by ATC.

## Authorization and parallel approaches

**Special aircrew and aircraft certification is required** for these minima. Circling is **not available**. Sydney has closely spaced parallel runways. Simultaneous approaches are authorized with runway **16L** under the [precision runway monitoring instructions](https://www.narev.ai/docs/irl-gym/airports/sydney/charts/precision-runway-monitoring.md).

During PRM operations, **dual VHF communications are required**. Transmit on tower frequency and monitor both tower and PRM; the local PRM guide includes participation, receiver setup and break-out instructions.

Aircraft may be radar vectored to final approach.

## Frequencies

All frequencies are MHz.

| Service | Frequency |
| - | - |
| ATIS | 118.55 |
| Approach north | 124.4 |
| Approach south | 128.3 |
| Director east | 125.3 |
| Director west | 126.1 |
| PRM | 119.45 |
| Tower | 120.5 |
| Surface movement east of runway 16R/34L | 121.7 |
| Surface movement west of runway 16R/34L | 126.5 |

## Terrain and chart conventions

Use **QNH**. Bearings are magnetic, with **13° east** variation. Altitudes and elevations are feet above mean sea level unless identified as radio-altimeter readings or heights. The map scale is **1:500,000**. Aerodrome elevation is **21 ft**; runway 16R threshold elevation is **7 ft**.

The **25 NM minimum sector altitude is 2,700 ft** and the **10 NM minimum sector altitude is 2,100 ft**, centred on the **YSSY aerodrome reference point**.

The map labels obstacle and spot elevations of **160, 190, 250, 255, 259, 299, 306, 320, 385, 389, 421, 430, 545, 641, 677, 725, 862, 887, 894, 1,001, 1,074 and 1,085 ft**. Their geographic placement still requires a complete text description.

Chart **SSYII20-183**, revised **12 June 2025**, from the fixed publication cycle effective **3 September 2026**.

Source: © Airservices Australia, [Departure and Approach Procedures](https://www.airservicesaustralia.com/aip/current/dap/), SSYII20-183.


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.