5 September 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

An extraordinary archaeological discovery in Spain: A new decorated stela has been found in context, in the 3000-year-old funerary complex

15 October 2023

15 October 2023 2

Archaeologists have discovered a new decorated stela in the 3000-year-old burial complex of Las Capellanías in Cañaveral de León (Huelva,...

The sword, thought to be a replica, turned out to be an authentic 3000-year-old Bronze Age sword

22 January 2023

22 January 2023

A sword in Chicago’s Field Museum that was previously thought to be a replica has been revealed to be an...

3600 years old Unique ancient drinking bowls on display at Boğazkale Museum

15 August 2021

15 August 2021

The 3,600-year-old fist-shaped drinking bowls found in excavations in Hattusa, the capital of the Hittite Civilization, which shaped the Anatolian...

3,000-Year-Old Twisted Gold Torc Discovered in Essex, southeast England

16 July 2023

16 July 2023

A metal detectorist has discovered a 3,000-year-old part of a twisted gold torc in a field near Mistley, on the...

Over 7,000-Year-Old Traces of Life Discovered in Ratina Cave on Šćedro Island, Croatia

28 February 2025

28 February 2025

Recent archaeological excavations on Šćedro Island, located south of Hvar, have unveiled significant findings that challenge previous understandings of the...

New stone ram heads unearthed in Luxor, Egypt

15 October 2021

15 October 2021

Mustafa al-Waziri, the Secretary-General of the Supreme Council of Antiquities (SCA), recently announced the discovery of new stone ram heads...

New suspect in greatest act of vandalism in the history of dinosaur study

29 May 2023

29 May 2023

Researchers from the University of Bristol are rewriting the history of paleontology’s darkest and most bizarre event. Vandals with sledgehammers...

Saudi Archaeologists have discovered a pre-Islamic Musnad inscription and a bronze bullhead

18 February 2023

18 February 2023

Saudi archaeologists have discovered the longest pre-Islamic Musnad inscription -of the ancient south Arabian script- and three gold rings and...

A unique golden sun bowl was discovered during an archaeological survey in Ebreichsdorf, Austria

3 October 2021

3 October 2021

A golden sun bowl and several hundred bronze objects were discovered during archaeological excavations in a prehistoric settlement in today’s...

Ancient Yayoi Period Settlement Discovered on Tokyo Condo Development Site

10 December 2023

10 December 2023

Excavations at the former site of the British Embassy in Tokyo’s Chiyoda Ward have uncovered the remains of a Yayoi...

Statue of Roman Emperor Hadrianus found in western Turkey

14 September 2021

14 September 2021

Excavations in the ancient city of Alabanda in the western province of Aydin have uncovered pieces of the statue of...

Mosaic Discovered in Illegal Dig in Zile Points to Ancient Roman Public Structure

12 July 2025

12 July 2025

Zile, a district in the Tokat province of northern Türkiye, has long been recognized as one of Anatolia’s most historically...

A former Spanish disco-pub confirmed as lost medieval Synagogue

11 February 2023

11 February 2023

In the Andalucian city of Utrera, archaeologists have uncovered the remains of a 14th-century synagogue. The discovery, made public on...

Medieval Weapon Chest Found on Sunken Medieval Flagship Gribshunden

20 April 2024

20 April 2024

An extensive exploration of the wreck of the royal flagship Gribshunden has unearthed a trove of new findings: new insights...

Scientists Create a 3D Model of Lost Temple Relief from a 134-Year-Old Photo Using AI

13 November 2024

13 November 2024

The researchers developed a neural network that can take a single 2D photo of a three-dimensional object and produce a...