Baltic Cable Attacks: Two Resilience Architectures Developed in 24 Hours From Breaking Event (SENTRY-LANE and DeepCorr Available for Briefing)

Position paper documenting escalating submarine cable infrastructure attacks in Baltic Sea and two resilience architectures developed within 24 hours of Fitburg incident demonstrating operational tempo achievable through systematic constraint-based methodology. Documents 13-month escalation pattern: October 2023 Newnew Polar Bear severed Balticconnector gas pipeline plus two telecom cables, November 2024 Yi Peng 3 severed BCS East-West and C-Lion1 cables, December 2024 Eagle S dragged anchor 90 kilometers severing Estlink 2 power cable plus four telecom cables, December 2025 Fitburg severed two additional cables—totaling 11 infrastructure severs with three vessel seizures but zero successful prosecutions. Identifies three architecture gaps in current defensive posture: Gap 1 absence of real-time seabed contact detection enabling interdiction before severance, Gap 2 weeks-long restoration timeline (2-6 weeks ship-based repair vs hours required), Gap 3 no corridor-level resilience for correlated multi-cable failure at geographic chokepoints. Introduces SENTRY-LANE cable-level detection and rapid restoration architecture providing real-time threat detection (90%+ accuracy, 150m spatial localization, seconds alerting), prosecution-grade attribution evidence (tiered packages from investigation trigger through criminal referral), rapid restoration without ship-based repair (6-24 hours vs 2-6 weeks conventional timeline). Introduces DeepCorr Mesh Hubs (DMH-R) corridor-level chokepoint resilience architecture providing automated bypass (30-60 second activation from failure detection), essential flow preservation (5-15% capacity for financial settlement, cloud control plane, government communications, critical infrastructure SCADA), physics-constrained latency penalty (30-40ms additional RTT from longer paths). Defense-in-depth framework composing both architectures: SENTRY-LANE handles single cable faults with detection/attribution/restoration, DMH-R handles multi-cable chokepoint failures with automated essential flow preservation. Strategic urgency: submarine cables carry 99% intercontinental data and $10 trillion daily financial transactions; current NATO Baltic Sentry provides surface presence without seabed awareness enabling interdiction only after damage detected; architectures use commercially available components validated against physical constraints deployable with existing technology. Technical specifications classified as High-Sensitivity Constraint Dossiers available for briefing to government defense agencies, NATO coordination bodies, critical infrastructure operators, qualified prime contractors under NDA or appropriate settings. Analysis demonstrates 24-hour development timeline from breaking event to validated architecture specifications proving operational tempo of constraint-based methodology. Addresses defense and critical infrastructure community requirement for cable protection architectures beyond surface patrol providing detection before severance, attribution surviving jurisdictional challenge, restoration in hours not weeks, and essential flow preservation during multi-system failures.