14 August 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

The Nightmare of the Roman Soldiers “Carnyx”

9 July 2023

9 July 2023

The Carnyx was a brass musical instrument used as a psychological weapon of war by the ancient Celts between 300...

Archaeologists in Derbyshire have unearthed a 9th century Anglo Saxon house

15 July 2021

15 July 2021

A nearly complete Anglo-Saxon house, considered to date from the early ninth century and might have been the abode of...

5700-year-old monumental Menga Dolmen reveals it as one of the greatest feats of Neolithic engineering

6 December 2023

6 December 2023

A new investigation tracing the source of the gigantic stones that make up the Menga dolmen in southern Spain reveals...

Grave Dig Uncovers 1,500-Year-Old Mosaic with Star of David and Cryptic Greek Petition in Türkiye

3 August 2025

3 August 2025

During a routine grave dig in Türkiye’s Diyarbakır province, archaeologists uncovered a remarkable 1,500-year-old mosaic featuring the Star of David...

Family Looking for Lost Gold Earring Finds Viking Age Artifacts in Their Garden on the Island Of Jomfruland

2 October 2023

2 October 2023

A family in Norway was searching for a lost gold earring in their yard on the island of Jomfruland when...

3,700-Year-Old Bronze Age Ceremonial Site Discovered in Derbyshire, in Northern England

23 March 2025

23 March 2025

In a remarkable revelation, archaeologists have uncovered that the Farley Moor stone, previously thought to be a solitary monument, is...

Uncovering the ritual past of ancient mustatils: Cult, herding, and ‘pilgrimage’ in the Late Neolithic of north-west Arabia

16 March 2023

16 March 2023

Mustatils—stone monuments from the Late Neolithic period thought to have been used for ritual purposes—have been the subject of new...

Failed Mongol fleet may actually land in Japan after 800 years

18 July 2023

18 July 2023

A  recent shipwreck was found off the coast of Japan this year and identified as part of a Mongol fleet...

An important discovery in Haltern: Mini temples and sacrificial pit discovered in Roman military encampment

16 November 2023

16 November 2023

Archaeologists from the Westphalia-Lippe Regional Association (LWL) have found remains of the foundations of two mini Roman temples and a...

Remarkably Preserved Bronze Age Urns, Thousands of Years Old, Unearthed in Germany

13 May 2025

13 May 2025

What appeared to be an ordinary stretch of County Road 17 between the towns of Moisburg and Immenbeck has turned...

More than 1,300 prehistoric burial mounds in western Azerbaijan systematically surveyed for the first time

2 January 2025

2 January 2025

Over 1,300 archaeological sites in Azerbaijan were systematically surveyed and documented in two field campaigns in 2021 and 2023 by...

Stunning carved stone depicting a mystery naked horseman is discovered at the Roman fort of Vindolanda

30 June 2021

30 June 2021

Near Hadrian’s Wall in northern England, archaeologists discovered a carved sandstone slab portraying a naked horseman. During the annual excavations...

Severed right hands reveal Trophy-Taking practices in Ancient Egypt

2 April 2023

2 April 2023

Twelve severed hands were found in Egypt as part of a horrifying “trophy-taking” practice that was just made revealed by...

The Half of the Rare Oil Lamp Found in Jerusalem May be in Budapest

9 May 2021

9 May 2021

We had recently reported on a grotesque lamp found in Jerusalem. The other half of the oil lamp, which is...

A Mysterious Human Face Carved on Stone Dated to Bronze Age Discovered in Kazakhstan

21 July 2024

21 July 2024

Kazakhstan’s rich archaeological landscape continues to reveal fascinating details about ancient civilizations. Recent research in the Akmola, and Pavlodar revealed...