RobotRisk Autonomous Systems Incident & Risk Register
RobotRisk / Royal Navy / 2026-06
other · malfunction

Royal Navy autonomous drone boat malfunctions, collides with yacht in Portsmouth Harbour

S2 · 06/2026 · Royal Navy · Portsmouth, England, UK

Record

CompanyRoyal Navy
Categoryother
Typemalfunction
Date06/2026
Time of daynot documented
LocationPortsmouth, England, UK
SeverityS2 (minor injury or single-unit damage)
Scale1 unmanned surface vessel
Confidencehigh
VerificationYes - adversarially checked against the cited source
SourceGB News

What happened

An unmanned Royal Navy drone boat malfunctioned and collided with a privately owned yacht in Portsmouth Harbour, causing property damage; no injuries reported.

Royal Navy record context

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other: entries by year

14282017 S1: 12017 S5: 12172019 S3: 11192021 S3: 11212022 S5: 11222023 S3: 12023 S4: 23232024 S1: 22024 S2: 42024 S3: 32024 S4: 72024 S5: 521242025 S1: 12025 S2: 72025 S3: 62025 S4: 82025 S5: 628252026 S1: 12026 S2: 92026 S3: 32026 S4: 22026 S5: 31826
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malfunction context

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