ISS Global / Investigation Report
Submersible Drone Incidents
Masbate recovery and the Novorossiysk attack claim
- Issued
- Location
- San Pascual, Masbate, Philippines / Novorossiysk, Russia
- Incident dates
- 30 December 2024 and 15 December 2025
- Language
- English
- Document
- 10 pages · PDF · 1.3 MB
A comparative investigation of a recovered underwater vehicle in the Philippines and a claimed underwater-drone attack in the Black Sea. Recovery is better established than operator identity in the Masbate case; the attempted attack is better established than damage severity at Novorossiysk.
Original report cover · Open PDF ↗Scope & reporting context
Research cut-off: 5 October 2026, 13:21 BST. Fresh analysis of two explicitly dated historical incidents, with geographic maps, incident chronology, exhibit imagery, official responses, source contradictions and a numbered source register. The cases are not linked operationally, and no global incident-frequency estimate is inferred. The report preserves uncertainty about the recovered vehicle’s operator, the attacking vehicle’s configuration and actual submarine damage.
The complete PDF contains the report’s source register, assessments and limitations. Read those alongside any individual finding.