Arctic EOD Operations: US Navy & NATO Multinational Exercise Analysis

Technical Summary: Arctic Specialist 26

Exercise Arctic Specialist 26, conducted in Kristiansand, Norway (24–26 February 2026), brought together Explosive Ordnance Disposal teams from the United States Navy, Swedish Armed Forces (Försvarsmakten), and Norwegian Armed Forces (Forsvaret). The exercise focused on three operational scenarios: naval mine identification and neutralization in coastal waters, underwater demolition charge handling and detonation, and land-based unexploded ordnance (UXO) disposal in Nordic environments.

The exercise involved coordinated international procedures for ordnance assessment, render-safe operations, and in-situ neutralization using both conventional and advanced EOD techniques. NATO standard safety protocols — particularly NATO STANAG 2389 (EOD Operations) and AOP-36 (Render Safe Procedures) — governed all demolition work. Thermal imaging, metal detection, and advanced diagnostics were employed to characterize ordnance prior to neutralization.

Analysis of Effects: Ordnance Types and Energetics in Cold Conditions

Naval Mine Typology

Naval mines encountered in Nordic waters typically fall into three categories. Contact mines (e.g., legacy German and Soviet designs) detonate when the hull of a vessel makes physical contact with the mine's horns or fuzing system. Influence mines respond to acoustic, magnetic, or pressure signatures without direct contact. Ground mines (benthic) lie on the seabed and are triggered by target signature or acoustic stimuli.

Historical naval mines in Nordic waters — including German SC series contact mines and Soviet-era designs — typically contain TNT or Torpex fills. Torpex formulations consist of RDX (42%), TNT (40%), and aluminium (18%). These energetic materials exhibit predictable sensitivity profiles at standard temperatures. However, extreme cold introduces non-linear effects on detonation velocity, primary explosive sensitivity, and metal casing brittleness that demand specialized analysis.

Cold-Weather Effects on Energetics and Detonation Physics

Energetic materials behave differently at sub-zero temperatures. Studies conducted by the NATO International Staff and the UK Defence Science and Technology Laboratory document several critical phenomena:

• Reduced detonation velocity: RDX and TNT-based formulations exhibit 3–8% slower detonation velocity at –20°C compared to 20°C baseline. This affects blast shock propagation and mine lethality calculations.
• Primary explosive sensitivity: Lead azide and lead styphnate (common fuzing initiators) become increasingly brittle and may exhibit altered initiation thresholds. Mechanical shock sensitivity can increase unpredictably.
• Metal casing embrittlement: Steel and iron casings lose ductility below –10°C, increasing fragmentation distribution and affecting render-safe assessment.
• Battery degradation: Electronic fuzes relying on thermal batteries experience voltage dropout and reduced firing current at extreme cold, potentially affecting reliability of remote fuzing systems.
• Water temperature effects: In Arctic waters, submersion in near-freezing water (0–4°C) can cause differential thermal expansion within ordnance, potentially opening micro-fractures in fuzing assemblies and affecting overall system stability.

Personnel and Safety Considerations

Arctic operations introduce human factors challenges distinct from temperate-zone EOD work. Protective equipment designed for standard environments becomes bulkier and less dexterous in extreme cold. Glove systems must balance thermal protection with the fine motor control required for fuze work — a challenge that has led to increased training emphasis on procedural discipline and team-based render-safe approaches rather than individual technician decision-making.

NATO STANAG 2389 compliance — which mandates distance, segregation, and evacuation protocols — becomes more difficult in Arctic terrain. Limited accessibility, poor visibility during polar darkness, and communication challenges in high-frequency-rich Arctic environments all affect safety perimeters and emergency response capability. Exercise Arctic Specialist 26 included full simulation of evacuation procedures and remote neutralization techniques to test these constraints.

Per AOP-36 and the NATO EOD Principles (AEODP-10), no render-safe procedure proceeds without explicit authorization from a designated senior EOD officer. In multinational exercises, command authority and safety sign-off protocols must be pre-established across language and doctrine boundaries — a procedural complexity that Arctic Specialist 26 was specifically designed to validate.

Data Gaps and Limitations

Open-source reporting on Arctic Specialist 26 does not disclose the specific mine types, ordnance serial numbers, or detailed fuzing configurations encountered during the exercise. Water depth and temperature conditions during operations have not been published. Exact charge weights used in underwater demolition scenarios remain unconfirmed. These gaps reflect proper operational security protocols, but they limit technical granularity in hazard characterization.

Published NATO research on cold-weather detonation velocity is limited; most datasets are derived from controlled laboratory studies rather than field operations. Extrapolating those findings to real-world ordnance with degraded or unknown storage history requires conservative assumptions and, where possible, non-destructive diagnostics prior to render-safe work.

ISC Commentary

Further analysis pending.