30 June 2025 The Future is the Product of the Past

Croatian Team Finds a Way to Effectively and Permanently Preserve Stuka Aircraft Wreck Under the Sea

 The ICUA Zadar team of conservators and archaeologists carried out in situ underwater conservation of the wreckage of the Junkers Ju 87 aircraft, known as the Stuka, achievement showed that it is possible to permanently protect an aircraft wreck under the sea.

As it is known, Croatia was one of the first countries to ratify the 2001 UNESCO Convention for the Protection of Underwater Cultural Heritage. By establishing a high-quality system for archaeological surveying, investigation, and preservation of underwater archaeological sites and finds, Croatia made tremendous strides in underwater archaeology at the start of the twenty-first century.

The ICUA Zadar team of conservators and archaeologists successfully completed a pilot project in October and November 2024 to test in-situ underwater protection for the Junkers Ju 87 aircraft wreck, also known as Stuka.

The “Stuka” is another name for the German dive bomber and ground-attack aircraft, the Junkers Ju 87. It was created by Hermann Pohlmann and made its first flight in 1935. The Ju 87 served the Axis powers from the start of World War II until its conclusion (1939–1945) and made its combat debut in 1937 with the Luftwaffe’s Condor Legion during the 1936–1939 Spanish Civil War.

Photo: Igor Goić

This dive bomber aircraft crashed near the island of Žirje in the Adriatic Sea during World War II.

In the past, it was thought that underwater aircraft wrecks could not be effectively preserved and that material corrosion would cause them to completely deteriorate and be destroyed in ten to fifteen years. A group of specialists assembled by the ICUA Zadar in May 2024 measured the corrosion on the Stuka wreck in order to conduct a conservation analysis. The results showed that the cathodic protection could be achieved using sacrificial anodes.

In October, the ICUA Zadar team installed two test anodes to assess their effectiveness. Subsequent measurements indicated that the connection of the anodes effectively passivated the wreck, halting further deterioration. This achievement showed that it is possible to permanently protect an aircraft wreck under the sea, making the Stuka the first wreck of its kind where the deterioration process was successfully stopped.

Photo: Igor Goić
Photo: Igor Goić

The trial installation of smaller anodes on the Stuka wreck will continue to provide protection in the coming months. In 2025, a comprehensive project will be implemented to protect the Stuka for the next fifteen years using this economically viable method.

There are still many difficulties in the recovery and long-term preservation of underwater archaeological artifacts and it is the consensus of many scientists that in situ preservation is the first choice before further procedures are considered. The exciting results of the project are therefore not only promising but also a major breakthrough.

The Croatian team’s dedication has led to an effective and economically viable way to preserve this wreck as a valuable historical monument and an inspiring diving destination.

ICUA ZADAR

Cover Image Credit: Roko Surić, MCPA

Related Articles

Rare biblical ‘balsam tree’ found depicted on ancient Jerusalem amethyst seal

21 October 2021

21 October 2021

Archaeologists working in the Old City of Jerusalem have discovered an engraved amethyst seal in the Second Temple, thought to...

Vikings arrived in Newfoundland 1,000 years ago: Scientists

20 October 2021

20 October 2021

Vikings’ first permanent settlement in North America – the coastal outpost in Newfoundland known as L’Anse aux Meadows now has...

Archaeologists Discovered the Largest Inscription Ever Found in Sri Lanka

10 February 2024

10 February 2024

Archaeologists discovered the largest inscription ever found in Sri Lanka. The largest inscription ever discovered in Sri Lanka was found...

Archeological park to be built at suburban Shanghai ancient ruins site in China

20 October 2021

20 October 2021

An archeological park will be built at the Qinglong Town ruins site of Baihe in Qingpu District as part of...

8000-year-old unique “fish-figure” small home tool found in Turkey

20 October 2021

20 October 2021

During this year’s excavations in the Yeşilova and Yassıtepe mounds in İzmir, a unique “fish-figure” small home tool was found....

Over 4 feet long sword found in a medieval grave in Sweden

29 December 2023

29 December 2023

An unusual and exciting discovery was made during archaeological research at Lilla Torg in the port city of Halmstad on...

Rare Astrolabe Discovered in Verona Sheds Light On Islamic, Jewish, and Christian Scientific Exchange

6 March 2024

6 March 2024

An eleventh-century rare astrolabe bearing Arabic and Hebrew inscriptions was recently discovered in a museum in Verona, Italy. It dates...

A 1,600-year-old church has been discovered in Turkey’s ancient city of Priene

19 October 2021

19 October 2021

A 1,600-year-old historical church was unearthed during the excavations in the Ancient City of Priene, located in the western province...

Archaeologists reveal 4,000-year-old rock-cut tomb, artifacts in Saqqara

8 January 2024

8 January 2024

A team of Egyptian and Japanese archaeologists has unveiled a rock-cut tomb believed to be more than 4,000 years old...

Remains of ‘female vampire’ found with sickle across her neck and a padlocked toe in Poland

2 September 2022

2 September 2022

A skeleton of what archaeologists believe may have been a 17th-century female vampire has been discovered near Bydgoszcz in Poland....

Complex Of Early Neolithic Monuments Discovered In Herefordshire, England

22 July 2023

22 July 2023

Archaeologists discovered a remarkable complex of early Neolithic monuments while investigating the area around Dorstone Hill in Herefordshire, England. The...

Romanian Police Find the Stolen Viking Helmet

21 February 2021

21 February 2021

Romanian police specializing in heritage crimes recovered a medieval helmet of “Viking origin” on February 7, which had disappeared a...

Turkish researchers use Artificial Intelligence to read cuneatic Hittite tablets

9 January 2023

9 January 2023

Thanks to a project implemented in Türkiye, 1,954 ancient Hittite tablets are being read for the first time using artificial...

A rare bronze talismanic healing bowl was discovered in Hasankeyf excavations

3 December 2023

3 December 2023

During the ongoing excavations in the Hasankeyf mound in Batman, one of the oldest settlements in the world, an 800-year-old...

Archaeologists Unearthed Third Greatest Fire Temple Existing in Ancient Iran’s Sassanid Era

11 July 2022

11 July 2022

Archaeologists have unearthed ruins of what they believe to be the third-greatest fire temple in ancient Iran during the Sassanid...