Executive Summary
In October 2023, HM Customs Gibraltar executed two record‑breaking cocaine seizures from the bulk carriers Unity N and Alice Oldendroff, recovering 508 kg of narcotics (street value ≈ £30 million). A compact, all‑directional FIFISH remotely operated vehicle (ROV) enabled patrol officers to scan each vessel’s hull quickly and safely, locating hidden sea‑chest compartments without deploying divers.

Operation Overview
| Date | Vessel | Quantity Seized | Concealment Method |
|---|---|---|---|
| 9 Oct 2023 | Unity N | ≈ 458 kg of cocaine | Packages magnet‑clamped inside a sea chest |
| 10 Oct 2023 | Alice Oldendroff | ≈ 50 kg of cocaine | Similar concealment below the waterline |
“This extraordinary feat underscores the relentless law‑enforcement effort by Customs.” — HM Government of Gibraltar press release 701/2023
Operational Challenge
- Sea‑chest concealment – Packages were hidden deep inside narrow recesses below the waterline.
- Safety & time constraints – Traditional diver inspections are slow, costly, and expose personnel to hazards.
- Night operations & low visibility – Searches began after 22:00 hrs in turbid waters.

FIFISH Solution
| Core Capability | Specification (Common Across FIFISH Range) | Operational Benefit |
|---|---|---|
| All‑directional 6‑thruster configuration | 360° pitch, yaw & lateral movement | Precise hovering inside sea‑chest recesses |
| 4K UHD camera + 166° FOV | Lossless zoom & evidentiary recording | Clear video for on‑scene prosecutors |
| Powerful dual LEDs | Adjustable intensity | Penetrates murky water at night |
| 100 m – 500 m depth rating & tether | Covers the entire draft of Panamax‑size vessels | No risk of losing the ROV |
| Lightweight & rapid deployment | Launch from small RHIBs | Fast response during bunkering stops |
These capabilities are standard across the FIFISH product family, providing a proven baseline for agencies that can later scale up to heavier‑duty E‑ and W‑Series systems with advanced tooling and autonomy packages.
Results
- 508 kg of cocaine was removed with no injuries or delays to commercial traffic.
- Record seizure – Largest Class‑A drug haul ever recorded by HM Customs Gibraltar at the time.
- Operational validation – Success prompted Gibraltar’s decision to expand its underwater‑drone fleet in 2024.
Key Takeaways for Maritime‑Security Agencies
- Force multiplier – A single operator can clear an entire hull in minutes, reserving divers for evidence recovery only.
- Scalable adoption – The modular FIFISH portfolio enables agencies to start with portable inspection units and upgrade to intervention-grade ROVs as the mission scope expands.
- Versatile toolkit – Beyond contraband searches, the same platform supports search‑and‑rescue, mooring‑line checks, and pier inspections.
- Training-friendly – A gamepad-style controller and optional VR headset cut the learning curve to hours, not weeks.