Fishing trawlers beware in the Med. Credit: Estado Mayor Defensa X
The Spanish Navy vessel Tambre has located and identified two torpedoes plus one naval mine dating back to the Second World War on the Mediterranean seabed, close to where fishing trawlers pass by.
Crew members aboard the minesweeper Tambre (M-33) made the find while serving with NATO’s Standing Mine Countermeasures Group 2, known as SNMCMG-2. Defence officials released details on April 23. One torpedo lay at a depth of just under 100 metres, adding complexity to the operation in this busy waterway.
Sonar operators first picked up several suspicious contacts on the vessel’s underwater detection systems. Experts then classified the shapes and positions as likely torpedoes and a mine. Technicians then launched the remotely operated vehicle Pluto Plus, fitted with sonar and cameras, to capture clear underwater images that verified the objects as Second World War ordnance.
Technical challenges at depth
Manoeuvring the Pluto Plus at 100 metres demands exceptional skill as its operators must maintain precise remote control while coordinating closely with the ship’s team. Images released by the Spanish Ministry of Defence show the torpedo resting on the seabed, its form still recognisable after decades underwater.
Such remnants continue to endanger commercial shipping and military vessels. Even long-submerged explosives can threaten safe passage across busy sea lanes if disturbed. For this reason, minesweepers still carry out regular surveys to detect, classify and, where required, neutralise these hazards.
Role of Spanish minesweepers in maritime safety
Participation in SNMCMG-2 forms part of wider efforts to protect freedom of navigation in ever busier waters. The Tambre contributes its advanced minehunting capabilities to the multinational group under Operation Noble Shield.
Torpedoes fired during wartime that missed their targets often sank to the bottom, where corrosion slowly degrades their casings over decades. Some retain live warheads capable of detonation if disturbed by nets, anchors, or dredging. Currents and storms can shift their positions, bringing them into contact with modern maritime activity.
Most modern encounters end safely thanks to protocols: crews report suspicious objects, avoid handling them, and allow naval explosive ordnance disposal teams to intervene with remote detonation. NATO mine countermeasures groups, including vessels like Spain’s Tambre, routinely locate and neutralise such items during patrols to reduce risks to shipping and fishing.
While fatal accidents have decreased with better awareness and equipment, the sheer volume of WWII remnants means occasional incidents continue. It is recommended that anyone encountering a suspected torpedo or similar device should maintain distance and contact local authorities immediately rather than attempt recovery.
In this instance, so that no one does venture to the sea floor in an attempt of salvaging the explosive, the authorities have understandably not released exact coordinates to avoid drawing public attention to the site.