PLEnlist

HMAS Sydney and the Kormoran, 1941: Australia's worst naval loss

World War II · 19 November 1941 · Australia vs Germany · ~8 min read · Updated October 2026

Next anniversary: 19 November 2026, the 85th anniversary 19 November in history ›

By

Gray cruiser HMAS Sydney in dazzle camouflage mooring at a Sydney wharf beneath the steel arch of the Harbour Bridge, sailors lining the rail, a crowd and newsreel van on the quay

HMAS Sydney mooring at East Circular Quay on her return from the Mediterranean, 10 February 1941. Australian National Maritime Museum, via Wikimedia Commons, public domain (Australian photograph taken before 1955)

At a glance

Australia (Royal Australian Navy)Capt. Joseph Burnett, HMAS Sydney (killed)
vs
Germany (Kriegsmarine)Capt. Theodor Detmers, auxiliary cruiser Kormoran
Date
19 November 1941, from about 4 p.m.; the guns opened soon after 5:30 p.m.
Location
Indian Ocean, about 150 nautical miles southwest of Carnarvon, Western Australia
War
World War II
Ships
Light cruiser HMAS Sydney against the auxiliary cruiser Kormoran, a converted freighter disguised as the Dutch Straat Malakka
Losses
Sydney sunk with all 645 men; Kormoran scuttled, with 78 to 80 of her crew lost and some 315 to 318 survivors (sources differ)
Outcome
Both ships sunk; the largest loss of life in the history of the Royal Australian Navy
Quick answer

What happened to HMAS Sydney?

On 19 November 1941 the Australian cruiser HMAS Sydney met the German raider Kormoran, disguised as a Dutch freighter, off Western Australia. Sydney came within a mile of her; the raider then opened fire with guns and torpedoes. Both ships were sunk. None of Sydney's 645 men survived, while more than 300 Germans did; the wrecks were found only in 2008.1

The Australian War Memorial calls it the most grievous loss the Royal Australian Navy ever suffered. On 19 November 1941 the light cruiser HMAS Sydney, the most famous ship in the navy, met a merchant ship off the coast of Western Australia. By midnight both were burning wrecks. More than 300 German sailors from the raider Kormoran were later picked up; of Sydney's 645 men not one was ever found alive.2

Who won the battle between HMAS Sydney and Kormoran, and why?

The Kormoran won the fight, though she did not survive it. A disguised freighter sank a far stronger cruiser, while most of her own crew lived. She won because Captain Burnett, treating her as an innocent merchant ship, brought Sydney to within about a mile, where surprise counted for more than the cruiser's heavier guns and greater speed.3

Sydney was not beaten without a reply. Badly hit, she still put shells into the raider's engine room and started fires that could not be put out, so that the Kormoran had to be abandoned and scuttled that night. The raider's cruise was over, but the price of ending it was the whole of the cruiser's company.4

Background: two very different ships

Sydney had made her name in the Mediterranean, above all in the action off Cape Spada in July 1940, when she fought the Italian cruiser Bartolomeo Colleoni. In 1941 she was back in Australian waters, escorting convoys along the Western Australian coast and beyond.5

Under Captain John Collins she had crippled the Bartolomeo Colleoni, which was then finished off with torpedoes, and chased her sister ship away. Coming when the war news was mostly bad, the victory made Sydney the best known ship in the navy. When she reached Sydney in February 1941 the city gave her company a civic reception, and the men marched through the crowded streets. Then she went back to war under a tight blanket of secrecy, escorting convoys from Fremantle.6

HMAS Sydney, a long light-colored cruiser with two tall funnels and two masts, crew lined up along the deck, lying still in a misty harbor in 1935
HMAS Sydney in 1935, the year she was commissioned: a Modified Leander-class light cruiser of 7,250 tons with eight six-inch guns. The Argus (Melbourne), HMAS Sydney, photograph, 1935, State Library of Victoria H98.105/2529. Public domain (photograph published in Australia before 1955), via Wikimedia Commons

The Kormoran was her opposite. Converted from a freighter, she was the largest of the German auxiliary cruisers. Her guns and torpedo tubes were hidden so that only close scrutiny would show she was not a merchant ship, and she carried a cargo of mines to be laid off the Australian coast. Her task was to work alone against unescorted shipping for months at a time, avoiding publicity and meeting supply ships in remote places. In November 1941 she was disguised as the Dutch freighter Straat Malakka.7

She had been built as the freighter Steiermark for the Hamburg-America Line and was taken over for war before she had sailed in trade. Under Theodor Detmers she left Gotenhafen in the Baltic on 3 December 1940, slipped into the Atlantic disguised as a Russian freighter and took her first victim, the Greek steamer Antonis, in January 1941. After months of raiding in the Atlantic she rounded the Cape of Good Hope into the Indian Ocean, and by November she had been at sea for almost a year.8

Her guns sat behind counterweighted screens that could be dropped in moments. Heinz Messerschmidt, one of her officers, later described how Detmers drilled the gun crews twice a week so that they could uncover the guns and open fire within seconds, and told each gunner where to aim if they ever met a warship: at the bridge first.9

Armies and commanders: two captains

Sydney's captain was Joseph Burnett, a highly regarded officer who had spent the first years of the war ashore as Assistant Chief of Naval Staff and took command of the cruiser in May 1941. Her complement of 645, 42 officers and 603 sailors, included six members of the Royal Australian Air Force who flew and maintained her aircraft, four civilian canteen staff and six men of the Royal Navy.10

Sailors of HMAS Sydney in white uniforms, steel helmets and anti-flash hoods manning two long four-inch guns on deck at sea, 1939 or 1940
Sydney's crew at her four-inch guns in 1939 or 1940. Of the 645 men aboard on 19 November 1941, none came home. The Argus (Melbourne), 4 inch guns on HMAS Sydney, photograph, 1939 or 1940, State Library of Victoria H98.105/3249. Public domain (photograph published in Australia before 1955), via Wikimedia Commons

Kormoran was commanded by Fregattenkapitän Theodor Detmers. Her crew numbered 393 by the War Memorial's count and 380 by the Western Australian Museum's.11

Dark locator map of the Indian Ocean off the coast of Western Australia, with the coastline and Shark Bay on the right and a gold star in a glowing circle out to sea
The waters off Shark Bay and Steep Point on the Western Australian coast, where Sydney and Kormoran met on 19 November 1941 and where both wrecks were found in 2008, about 12 nautical miles apart. Drawn for this article from Natural Earth data, with no modern borders. Location map: © Echoes of Battle (data: Natural Earth, public domain)

The battle in phases

The return voyage. Sydney sailed from Fremantle on 11 November 1941 to escort the troopship Zealandia toward the Sunda Strait, handed her over to the British cruiser Durban on 17 November and turned back for Fremantle, where she was due on 20 November.12

The sighting. At about 4 p.m. on 19 November, off the coast between Shark Bay and Carnarvon, the two ships sighted each other. The sources place the meeting some 120 to 150 miles from the coast, and give the times an hour apart, because the German account was kept in a time zone one hour behind local time.13

Detmers's choice. The raider's orders were to keep away from warships. Detmers turned away into the sun at the best speed he could make, which also made his flag signals harder to read, and kept up the pretense of a Dutch freighter. If it came to a fight, the raider's only chance was to lure the cruiser as close as possible before showing her guns.14

The challenge. Sydney closed on a converging course, signaling repeatedly for the ship to identify herself. The Germans fumbled their flag hoists, as slow merchant ships often did, and broadcast a suspicious ship message in the name of the Straat Malakka. By about 5:15 to 5:30 Sydney had drawn almost level with the Kormoran, less than a mile away, with her guns trained and her aircraft on the catapult.15

Burnett's choice. Burnett knew that a raider might be off the coast, yet he treated the ship as innocent and kept closing, guns trained but, by the German account, with his crew not at action stations. Why he came so near has never been explained; the 2009 inquiry called the final range virtually point-blank for naval guns.16

Turning point: the secret sign

Sydney asked where the ship was bound and was told Batavia. Then she hoisted the letters IK, the middle letters of the real Straat Malakka's secret call sign, and finally signaled in plain language: show your secret sign. The Kormoran could not answer. Detmers struck the Dutch flag, raised the German ensign and opened fire with every gun, launching two torpedoes at the same moment.17

At that range the advantage of the cruiser's heavier guns and higher speed was gone. The Kormoran's first salvoes probably destroyed Sydney's bridge and gun direction; her forward turrets were knocked out, and a torpedo struck her under them. Another salvo wrecked her Walrus seaplane on its catapult and spread burning fuel amidships. Sydney's after turret hit back hard, setting the raider's engine room on fire.18

The German ensign was up before the first shot, the 2009 inquiry concluded. The raider's light guns, mounted close to her bridge, swept Sydney's bridge while the heavy guns hit her gun director. The inquiry judged that Burnett and most of his officers probably died in the first minutes, and that by the time the firing stopped perhaps 70 percent of the crew were dead or wounded.19

Sydney, down by the bow, turned as if to ram, passed astern of the raider and fired torpedoes that missed. As the Kormoran's engines failed, the cruiser limped off to the south, burning from the bridge to the after funnel. The raider kept firing until about 6:25. The Germans last saw Sydney about ten miles off; then only a glow, and flickers that faded before midnight.20

Aftermath: the search

Detmers ordered his crew to abandon ship, and the last boats left her around midnight, when the scuttling charges were fired. The War Memorial's accounts put her dead at 78 to 80 and her survivors at 315 to 317; the Western Australian Museum counts some 318 survivors from a crew of 380.21

Typed and handwritten Australian military form headed German Prisoner of War Service and Casualty Form for Commander Theodor Anton Gunther Detmers, with entries from 1941 to 1947
The prisoner of war record of Kormoran's captain, Theodor Detmers, kept by the Australian Military Forces. It notes his capture on 27 November 1941, his march into Fremantle from the Kormoran, a brief escape from a camp in January 1945 and his repatriation in January 1947. Australian Military Forces, German Prisoner of War Service and Casualty Form, Theodor Detmers, National Archives of Australia A5954, 2400/21. Public domain (Australian Government work, copyright expired), via Wikimedia Commons

When Sydney failed to reach Fremantle on 20 November, the alarm was slow to rise, because the Zealandia's voyage had been delayed. On 23 November she was ordered to report by signal and did not reply. The next day the British tanker Trocas reported picking up 25 German sailors from a raft, the first sign of a battle; over the following days aircraft and ships found the boats and rafts of the Kormoran's survivors. The Germans spent the rest of the war in Australian prisoner of war camps.22

Detmers himself was picked up about a week after the battle and landed at Carnarvon. Under interrogation he gave the position of the action, about 26°34' south and 111° east, a figure that would one day guide the search for both wrecks.23

The only substantial wreckage thought to come from Sydney was a Carley float, badly damaged by shellfire, picked up by HMAS Heros about a week after the battle and now in the Australian War Memorial, which believes it probably came from the cruiser.24

Legacy and memory

With no Australian survivors, every account of the battle came from the enemy. The gap filled with rumors and conspiracy theories, which the War Memorial says have no basis in fact. The official historian, Hermon Gill, asked why Captain Burnett had not kept his distance and used his speed and armament, and in 1999 a parliamentary committee heard the arguments again. Among the theories were claims that a Japanese submarine had helped sink the cruiser and that Australian survivors had been killed in the water.25

On 17 March 2008 the Australian government announced that both wrecks had been found, about 112 nautical miles off Steep Point and some 12 nautical miles apart, at depths of about 2,500 meters. The search had been run by a small private group, the Finding Sydney Foundation, with the British wreck hunter David Mearns as search director; trusting the German survivors' accounts, it found the Kormoran first and then the cruiser. A Commission of Inquiry under the former judge Terence Cole followed. Its report of 2009 found that the damage seen on the wreck confirmed the German account, judged that Burnett's decision to treat the ship as innocent had cost Sydney every advantage, and found no substance in any of the conspiracy theories. Cole did not, however, find Burnett negligent.26

The pictures of the wreck also explained the silence. They showed Sydney's boats and floats shattered by shellfire and fire, so that the men still alive when the guns stopped had no way to leave the ship; the inquiry concluded that they died when she sank in the night.27

One more of Sydney's men came home in the end. In February 1942 a Carley float carrying the body of a sailor drifted ashore on Christmas Island, and he was buried there as an unknown sailor. His remains were exhumed in 2006, and in November 2021, eighty years after the battle, DNA showed him to be Able Seaman Thomas Welsby Clark of Brisbane, 21 years old.28 › 19 November in military history

Notes

A number in the text points to a note; each note names the works that paragraph draws on, listed in full under Sources.

  1. Australian War Memorial, “HMAS Sydney II and the Kormoran”; Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  2. Australian War Memorial, “HMAS Sydney II and the Kormoran”; Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  3. Australian War Memorial, “HMAS Sydney II and the Kormoran”; Western Australian Museum, “The Cole Inquiry”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  4. Australian War Memorial, “HMAS Sydney II and the Kormoran”; Australian War Memorial, “Sydney-Kormoran action”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  5. Australian War Memorial, “HMAS Sydney II and the Kormoran”; Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  6. L. F. Holmes, Naval Historical Review; Western Australian Museum, “History of HMAS Sydney (II)”. ↩
  7. Australian War Memorial, “HMAS Sydney II and the Kormoran”; Australian War Memorial, “Auxiliary cruiser Kormoran”; Sea Power Centre, “HMAS Sydney (II)”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  8. Australian War Memorial, “Auxiliary cruiser Kormoran”; L. F. Holmes, Naval Historical Review. ↩
  9. Western Australian Museum, “The Cole Inquiry”; Australian War Memorial, “Captain Joseph Burnett”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  10. Bob Trotter, “Commitment, Persistence and Science”; Parliament of Australia, “The loss of HMAS Sydney, chapter 4”; Western Australian Museum, “Battle with the HSK Kormoran”; Mal Booth, “The discovery of HMAS Sydney”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  11. Australian War Memorial, “Auxiliary cruiser Kormoran”; Australian War Memorial, “Sydney-Kormoran action”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  12. Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  13. Australian War Memorial, “Sydney-Kormoran action”; Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”; Parliament of Australia, “The loss of HMAS Sydney, chapter 4”. ↩
  14. Australian War Memorial, “Sydney-Kormoran action”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  15. Australian War Memorial, “Sydney-Kormoran action”; Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  16. Western Australian Museum, “The Cole Inquiry”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  17. Sea Power Centre, “HMAS Sydney (II)”; Australian War Memorial, “Sydney-Kormoran action”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  18. Australian War Memorial, “Sydney-Kormoran action”; Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  19. The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”; Western Australian Museum, “The Cole Inquiry”; Australian War Memorial, “Sydney-Kormoran action”. ↩
  20. Australian War Memorial, “Sydney-Kormoran action”; Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  21. Western Australian Museum, “History of HMAS Sydney (II)”; Western Australian Museum, “The Cole Inquiry”; Mal Booth, “The discovery of HMAS Sydney”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩
  22. Sea Power Centre, “HMAS Sydney (II)”; Western Australian Museum, “Battle with the HSK Kormoran”; Parliament of Australia, “The loss of HMAS Sydney, chapter 4”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  23. L. F. Holmes, Naval Historical Review; Western Australian Museum, “Finding HMAS Sydney (II)”. ↩
  24. Australian War Memorial, “Carley float”; Sea Power Centre, “HMAS Sydney (II)”; Naval Historical Society of Australia, “Australian Naval History on 28 November 1941”. ↩
  25. Australian War Memorial, “HMAS Sydney II and the Kormoran”; Parliament of Australia, “The loss of HMAS Sydney, chapter 4”; Western Australian Museum, “The Cole Inquiry”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  26. Australian War Memorial, “HMAS Sydney II and the Kormoran”; Western Australian Museum, “The Cole Inquiry”; Sea Power Centre, “HMAS Sydney (II)”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”; Western Australian Museum, “Finding HMAS Sydney (II)”; Bob Trotter, “Commitment, Persistence and Science”. ↩
  27. Western Australian Museum, “The Cole Inquiry”; The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”. ↩
  28. The Strategist, “HMAS Sydney's unknown sailor identified, but mysteries remain”; Western Australian Museum, “Battle with the HSK Kormoran”. ↩

Sources

Frequently asked questions

When was HMAS Sydney sunk?

On 19 November 1941, in action with the German auxiliary cruiser Kormoran off Western Australia. She is believed to have sunk during that night.

How many men died on HMAS Sydney?

All 645 men on board: 42 officers and 603 sailors, among them six RAAF members and four civilian canteen staff.

Who sank HMAS Sydney?

The German auxiliary cruiser Kormoran, a disguised merchant raider commanded by Theodor Detmers, which was itself sunk in the fight.

How did Kormoran trick Sydney?

She posed as the Dutch freighter Straat Malakka and drew Sydney to within about a mile before opening fire with hidden guns and torpedoes.

When were the wrecks of Sydney and Kormoran found?

The discovery was announced on 17 March 2008. The wrecks lie about 12 nautical miles apart, some 112 nautical miles off Steep Point, at depths of about 2,500 meters.

What did the Cole Inquiry find?

That the evidence of the wrecks confirmed the German account of the battle, that Captain Burnett's decision to treat Kormoran as innocent led Sydney into danger, and that the conspiracy theories had no substance.

Who was the unknown sailor of HMAS Sydney?

Able Seaman Thomas Welsby Clark, whose body drifted to Christmas Island on a Carley float in 1942. He was identified by DNA in 2021.

Battle honors of your homeland

The turning points of history

Marathon, Gaugamela, Cannae, Constantinople, Waterloo, Stalingrad: the days the world changed course.

The Battle of Marathon, 490 BCThe Battle of Gaugamela, 331 BCThe Battle of Cannae, 216 BCThe Fall of Constantinople, 1453The Battle of Waterloo, 1815The Battle of Stalingrad, 1942-1943

Based on your country, which we do not store · why? ·

Stand on Sydney's bridge

Echoes of Battle brings the great battles of history to life, scene by scene on the real map. Enlist below and we will send word to your inbox the day it launches.

Or supply the campaign on Ko-fi ›