The Transmedium Problem: Sea Lanes, Ports, and Supply-Chain Continuity
TL;DR
The maritime/undersea dimension is the most sensor-corroborated part of the modern UAP record — naval radar (AN/SPY-1 Aegis), FLIR/ATFLIR targeting pods, and shipboard combat-information-center displays from carrier strike groups — yet it is the least examined in commercial and insurance terms. The enterprise exposure is an operational-continuity problem, not a metaphysical one.
For continuity and insurance purposes, a transmedium incursion over a chokepoint or port is indistinguishable from a drone or uncrewed-surface-vessel (USV) incursion. The Red Sea (2023–2026) and the 2021 Ever Given blockage have already demonstrated exactly how a single-point maritime disruption reprices war-risk insurance, reroutes traffic, and cascades through global supply chains — regardless of what caused it.
The decisive variables are policy wording and operational-continuity planning, not origin. Whether an object is an exotic craft, an adversary drone, a sensor artifact, or a misidentification, the loss turns on JWC listed-area mechanics, war/terrorism exclusions and attribution, the physical-damage trigger, and General Average — all of which resolve independently of the "what is it" question.
Key Findings
The transmedium naval record is real, official, and unusually well-instrumented — but thin on calibrated water data. The Pentagon officially released FLIR1 (2004 Nimitz), GIMBAL and GOFAST (2015 Roosevelt) on April 27, 2020, confirming authenticity while characterizing the objects as "unidentified." The 2004 Nimitz "Tic Tac" case combined USS Princeton AN/SPY-1 radar tracks, pilot eyewitness accounts (Fravor, Dietrich), ATFLIR video, and a surface "whitewater disturbance" — the transmedium signature. The 2019 USS Omaha case shows a sphere descending into the ocean; the Pentagon (via spokesperson Susan Gough) confirmed the footage was authentic Navy imagery.
AARO's own reporting shows the paradox. The DoD/ODNI FY2024 Consolidated Annual Report on UAP (released November 14, 2024) logged 757 UAP reports and states verbatim: "Of these reports, 708 occurred in the air domain, 49 occurred in the space domain, and none occurred in the maritime or transmedium domains" — precisely because the ocean is a sensing-poor environment. The compelling maritime cases come from military-grade sensors; the sparse ongoing reporting reflects a data-collection gap, not an absence of phenomena.
The maritime system has already proven the "airspace-closure" cascade. The Ever Given blocked the Suez Canal for six days in March 2021, holding up ~$9.6 billion/day of trade; the owner declared General Average, spreading the loss across all cargo interests. The Red Sea/Houthi crisis (2023–2026) drove war-risk premiums roughly 100-fold — from a nominal ~0.05% (often waived) to as high as 1% of hull value — cut Bab-el-Mandeb transits by more than half, and forced Cape of Good Hope diversions.
The insurance transmission mechanism is precise and origin-agnostic. The Joint War Committee's Listed Areas, the 7-day (72-hour for the five powers) notice of cancellation, additional war-risk premium (AWRP), held-covered/breach-of-warranty mechanics, the physical-damage trigger gap, and General Average together determine whether and how a UAP-driven maritime disruption becomes a priced, shared, or excluded loss.
The decoupling argument holds on a fully prosaic reading. Uncrewed underwater vehicles (UUVs), USVs, and undersea-cable sabotage (Baltic Sea, 2023–2026) are documented, non-exotic versions of the transmedium continuity threat. The exposure exists regardless of whether any single UAP case is anomalous.
Details
1. The documented transmedium operational record (the tiered spine)
Tier 1 — Sensor-corroborated naval encounters (the documented foundation).
2004 USS Nimitz / USS Princeton "Tic Tac" (off Southern California, November 2004). Two F/A-18F Super Hornets from the Nimitz Carrier Strike Group, flown by Cmdr. David Fravor and Lt. Cmdr. Alex Dietrich, were vectored by the USS Princeton toward a contact roughly 100 miles southwest of San Diego. The Princeton's AN/SPY-1B Aegis radar had, for roughly two weeks prior, tracked objects appearing at ~80,000 feet, descending rapidly to ~20,000 feet, and hovering. Arriving on station under clear skies and calm seas, the aircrews observed an area of churning "whitewater" the size of a Boeing 737, with a smooth, white, ~40-foot wingless "Tic Tac"-shaped object hovering above it. The object mirrored Fravor's descent, then accelerated away; the Princeton reportedly reacquired it at the pre-briefed CAP point ~60 miles away within under a minute. A second sortie captured the FLIR1 video via ATFLIR pod. The transmedium element is specific: the surface disturbance beneath the airborne object. Fravor testified to these facts under oath before the House Oversight Subcommittee on National Security on July 26, 2023; his sworn statement records that the object "was far superior in performance to my brand new F/A-18F and did not operate with any of the known aerodynamic principles that we expect for objects that fly in our atmosphere." The DoD officially released FLIR1 on April 27, 2020. Tiering note: the close-range visual is eyewitness testimony; the raw Princeton radar tapes have not been publicly released in independently verifiable form, and the FLIR1 clip alone does not resolve range/kinematics — a limitation acknowledged even in pro-disclosure analyses. Substack + 2
2015 USS Theodore Roosevelt (off the US East Coast). The GIMBAL and GOFAST videos were recorded by Roosevelt air-wing crews operating in the W-72 warning area off Virginia Beach. Lt. Ryan Graves testified July 26, 2023 that UAP sightings became "an open secret" and were "not rare or isolated; they are routine," describing near-daily radar detections and a near-miss in which two jets, ~100 feet apart, took evasive action against a "dark gray cube inside of a clear sphere" motionless at the airspace entry point; the squadron filed a safety report with no official follow-up. Graves estimated only ~5% of UAP sightings are reported. GIMBAL and GOFAST were officially released April 27, 2020. Georgia Recorder + 3
2019 Southern California destroyer "drone swarm" events and USS Omaha (July 15, 2019). Multiple Navy destroyers (USS Kidd, USS Rafael Peralta, USS Russell, USS John Finn) reported unidentified craft over several days in July 2019. Aboard the USS Omaha (LCS-12), Combat Information Center personnel recorded FLIR video of a spherical object that maneuvered above the ocean and then descended into the water; crew audio records "splash." A Carrier Strike Group 9 comment accompanying the released materials stated: "USS Omaha observed a possible UAS, spherical in shape moving towards the surface of the water and then disappearing… OMA assessed the object had sunk. Attempts to search the water for wreckage were ineffective." A submarine reportedly searched unsuccessfully. Pentagon spokesperson Susan Gough confirmed: "I can confirm that the video was taken by Navy personnel, and that the [UAP Task Force] included it in their ongoing examinations." Tiering note: the Pentagon confirmed provenance only, not kinematics; some FOIA-derived reporting attributes at least part of the 2019 SOCAL events to drones launched from nearby vessels. This is the cleanest publicly available "transmedium" video but its target attribution remains unresolved.
2013 Aguadilla, Puerto Rico (CBP thermal-imaging case). A US Customs and Border Protection DHC-8 recorded MWIR (Wescam MX-15D) footage on April 25–26, 2013 of an object crossing the Rafael Hernández Airport and apparently entering the ocean. The Scientific Coalition for UAP Studies (SCU) published a ~165-page technical analysis (Powell et al.), asserting radar corroboration and anomalous, transmedium behavior. Critical tiering note: in March 2025, AARO released an official Puerto Rico case-resolution report concluding, with high confidence, that the footage shows two small objects drifting at wind speed over land — bounding motion at ~8 mph, attributing the "water entry" to thermal crossover/contrast loss, and rejecting the split/transmedium interpretation. This case is therefore held below the line: it illustrates how a compelling transmedium narrative can be substantially reduced by official reconstruction, and it is a cautionary template for the whole category. UAPedia + 2
The "five observables" and transmedium travel. Luis Elizondo (former AATIP) popularized the "five observables": positive lift/anti-gravity without visible propulsion, sudden/instantaneous acceleration, hypersonic velocity without signatures, low observability, and transmedium travel. Transmedium travel — seamless transition between air, water, and space without performance loss — is the fifth and the one most relevant here. These are analytical filters, not proof; each case must clear the null hypothesis. The observables framework has been referenced in UAP legislation. Hope for the Journey + 2
Below-the-line lore (mapped, held below). "Unidentified submerged object" (USO) claims and undersea-base speculation are part of the cultural record but lack primary-source corroboration; they are noted and explicitly excluded from the analytical foundation.
2. Undersea detection and the sensing gap
US undersea surveillance rests on the Integrated Undersea Surveillance System (IUSS), evolved from the Cold War SOSUS fixed hydrophone arrays plus mobile SURTASS towed-array ships, under Commander Undersea Surveillance. SOSUS/IUSS was optimized to detect the narrow-band acoustic tonals of submarines transiting chokepoints (e.g., the GIUK Gap), not to characterize small, fast, quiet, or non-acoustic submerged objects. The system's existence was declassified in 1991; the Navy is upgrading it via the Deep Reliable Acoustic Path Exploitation System (DRAPES). The analytical point: the ocean is a sensing-poor environment. This is precisely why maritime UAP data is simultaneously compelling (when a military sensor happens to capture it) and sparse (AARO logged zero maritime/transmedium reports in FY2024) — and why calibrated undersea characterization of anomalous fast-movers is an acknowledged capability gap rather than a solved problem. The DiplomatNavy Lookout
3. The enterprise-continuity translation — ports, sea lanes, chokepoints
The aviation "airspace-closure" analog, applied to water. The late-2024 US drone-sighting episode touched maritime facilities directly: Naval Weapons Station Earle (NJ) confirmed "multiple instances of unidentified drones entering the airspace above" the base; sightings clustered near ports, reservoirs, and nuclear plants (Salem/Hope Creek); the FAA imposed temporary flight restrictions over Picatinny Arsenal (Nov 25–Dec 26). Airports including Stewart International briefly closed. The episode is the template for both the disruption problem and the null-first resolution (below). ABC7 New YorkABC News
Chokepoint vulnerability as the risk-amplification frame. Per EIA's World Oil Transit Chokepoints analysis, in the first half of 2025 total oil flows through the Strait of Hormuz "averaged 20.9 million b/d, or the equivalent of about 20% of global petroleum liquids consumption, and one-quarter of total global maritime traded oil"; the Strait of Malacca is the largest chokepoint, with an estimated 23.2 million b/d in 1H2025, equivalent to 29% of total maritime oil flows; Bab-el-Mandeb carried ~4.2 mb/d and Suez/SUMED ~4.9 mb/d. UNCTAD's Review of Maritime Transport states that "over 80% of the volume of international trade in goods is carried by sea, and the percentage is even higher for most developing countries." These are the arteries; a single-point disruption at any of them cascades. Visual Capitalist
The Ever Given (March 2021) — the canonical single-point cascade. The 400-meter, ~224,000-ton, 20,000-TEU vessel wedged across the Suez Canal on March 23, 2021 and blocked it for six days. Lloyd's List estimated held-up trade at ~$9.6 billion/day — valuing westbound traffic at "around $5.1 billion a day and eastbound traffic approximately $4.5 billion," while the journal conceded these were "rough calculations" (~$400 million/hour). Roughly 185 vessels queued. The owner, Shoei Kisen Kaisha, declared General Average (early April 2021, reported April 1) and appointed Richards Hogg Lindley as adjuster. A formal settlement with the Suez Canal Authority (~$540 million, exact figure never officially confirmed) was reached in early July 2021; the ship sailed July 7. The UK P&I Club was the vessel's liability insurer and led SCA negotiations. This is the proof that a non-attributable, non-hostile maritime blockage becomes a systemic, shared insurance event.
The Red Sea / Houthi crisis (2023–2026) — the live proof case. Since November 2023, Houthi forces have conducted 100+ attacks on shipping using missiles, one-way aerial drones, and explosive USVs. Additional war risk premium rose roughly 100-fold: Lloyd's List reported pre-crisis APs "typically stood at a nominal 0.05%… many underwriters waived them altogether," while post-airstrike quotes hit 1% of hull value — a level Reuters/Lloyd's again quoted in the week of July 7, 2025 (a $100m vessel → up to $1m per seven-day transit). Rates eased toward ~0.2–0.3% during lulls and re-spiked with renewed attacks. Bab-el-Mandeb daily transits fell from >70 pre-war to the 30s (Suez transit trade volume fell ~57.5% by early 2024 per IMF PortWatch). Major lines (Maersk, etc.) diverted around the Cape of Good Hope, adding 10–14 days and, per one estimate, $1.2–1.8m in fuel per round trip. The USV dimension is central and directly transmedium-adjacent: the M/V Tutor (Liberian-flagged, Greek-owned bulk carrier) was struck and sunk by a Houthi explosive USV in June 2024 — the first successful USV strike of the campaign — with severe engine-room flooding; the Sounion, Chios Lion, and others were also hit. For continuity purposes, the operational effect of a USV or drone incursion at a chokepoint is identical whatever the object's origin. MarineLink + 3
4. Marine insurance mechanics (US + London, clause-level)
Structure: marine risks vs. war risks. Standard hull cover (Institute Time Clauses Hull) and cargo cover exclude war and strikes via the "free of capture and seizure" (f.c. & s.) paramount exclusion; that excluded band is bought back through separate war/strikes wordings — Institute War Clauses (Cargo) CL.385 (strikes) / CL.386 (war), and Institute War and Strikes Clauses (Hulls-Time) CL.281 (1/10/83). The London-market system was deliberately harmonized in 1982 (cargo) and 1983 (hull/freight) so the war-risk policy covers what the marine-risk policy excludes. Historically courts have struggled to separate marine-peril from war-peril causation (e.g., navigational error vs. warlike operation). Law Insider + 2
The JWC and Listed Areas — the direct repricing mechanism. The Joint War Committee (Lloyd's Market Association + IUA) maintains the "Hull War, Piracy, Terrorism and Related Perils Listed Areas." Transiting a listed area triggers the requirement to notify underwriters and pay AWRP, calculated as a percentage of Hull & Machinery value pro-rated over a seven-day reference period (Premium = Sum Insured × Rate% × Actual Exposure Days / 7). As of the March 3, 2026 revision (JWLA-033), the JWC added Bahrain, Djibouti, Kuwait, Oman, and Qatar and amended the Persian/Arabian Gulf–Gulf of Oman–Indian Ocean–Gulf of Aden–Southern Red Sea listed area, following the February 2026 Iran conflict; several insurers issued notices of cancellation to re-rate. The Hull War Notice of Cancellation Administration Clause sets notice at 7 days, reduced to 72 hours where one of the five powers (China, France, Russia, UK, US) is involved. The LMA has stressed that despite cancellation notices, hull war cover "remains in place and available in the London market." This is the precise channel through which a persistent maritime UAP hotspot — whatever its cause — would translate into priced risk: a listing, an AWRP, and re-rating cycles.
Held-covered, breach of warranty, and AP. War-risk policies commonly contain "Warranted Free of Capture and Seizure" provisions; an owner must declare intent to enter a listed area and pay the additional premium. Failure can void cover ("held covered" only on prompt notice and agreed AP). Automatic termination on outbreak of war between the great powers is standard.
General Average (York-Antwerp Rules) — the loss-mutualization engine. When a maritime incident triggers GA (as in Ever Given), the York-Antwerp Rules require all cargo interests — even undamaged cargo — to contribute proportionally to sacrifices/expenses incurred for the common safety. The carrier holds a lien over cargo and releases it only against GA security: a signed General Average Bond plus a cash deposit or an average/underwriter's guarantee from the cargo insurer. This is the mechanism by which one disruptive event becomes a shared, systemic loss.
The physical-damage trigger gap — the crux for pure disruption. Traditional port/terminal and business-interruption cover responds only to business interruption caused by physical damage. Pure operational disruption with no physical loss — the exact profile of an airspace/waterspace closure from an incursion — typically falls outside standard wordings. This gap, exposed by COVID-BI litigation and Red Sea losses, prompted Marsh and Tokio Marine Kiln to launch a first-of-its-kind port trade-disruption / business-interruption facility (up to $50m per incident, no geographic limit) explicitly because, in the words of Louise Nevill, CEO of UK Marine at Marsh Specialty, "the standard ports and terminals policies would not respond to these incidents as there was no physical damage or indeed berth blockage yet they were suffering significant losses of revenue." Trade Disruption Insurance (TDI) and Marine War Risk Insurance (MWRI) can cover blockage/detainment/loss of hire without a physical-damage trigger, but these are specialist, non-standard products. A UAP incursion that closes a port or lane without touching a ship is, under standard cover, very likely uninsured.Marsh + 2
Attribution and the war/terrorism exclusion — the UAP-specific crux. As in cyber and aviation, whether a loss is excluded (war/terrorism, which generally require a state or defined-actor nexus) or covered turns on attribution. UAP is by definition unattributed. A loss caused by a genuinely unidentified object sits in an analytic no-man's-land: it may fail to meet the "war/hostile act" threshold (no identifiable belligerent) yet also fall outside all-risks marine cover if a war/terrorism exclusion is read broadly, or if there is no physical damage. The marine war-risk framework's treatment of "unknown" perils, and the precise wording of the hostile-act/terrorism definitions, will decide the outcome — not the object's true nature.
5. Null-first / base-rate discipline
The overwhelming base-rate explanations for maritime and coastal "incursions" are prosaic: commercial and hobbyist drones, adversary ISR drones and USVs, birds, balloons, atmospheric/optical effects, and sensor artifacts (parallax, glare, gimbal-mount rotation, instrument error). The 2024–25 US drone episode is the template: after reviewing 5,000+ reports, the DoD, DHS, FAA, and FBI issued a December 16, 2024 joint statement finding the sightings were "a combination of lawful commercial drones, hobbyist drones, and law enforcement drones, as well as manned fixed-wing aircraft, helicopters, and stars mistakenly reported as drones," with "nothing anomalous." The FBI noted reported-sighting density matched major-airport approach patterns; some "drones" were the constellation Orion or Venus. Federal Aviation Administration + 2
On the famous naval cases, skeptic Mick West offers the null hypotheses the interesting hypothesis must clear: GIMBAL's apparent rotation as an infrared glare/gimbal-derotation artifact rather than a rotating craft; GOFAST's apparent speed as parallax against the ocean of a slower, higher object; FLIR1 as a distant aircraft with a zoom-change "teleport" artifact. AARO's FY2024 report resolves large numbers of cases to Starlink satellites, birds (flickering FMV from wing-flap), and balloons, and reiterates "no verifiable evidence of extraterrestrial beings, activity, or technology." AARO's March 2025 Aguadilla resolution is the clearest example of a celebrated transmedium case reduced to wind-drift plus thermal crossover. This null-first posture is exactly why wording and continuity planning dominate the origin question: the vast majority of incursions are prosaic, and even the anomalous residue produces continuity consequences identical to the prosaic cases. Leonarddavid + 3
6. The strategic/adversary frame (documented, for decoupling)
Even on a fully prosaic reading, the transmedium continuity exposure is real and growing. Houthi USVs (evolved from the explosive drone boat that struck a Saudi frigate in 2017) sank the Tutor and damaged multiple vessels; Ukraine's Black Sea USV campaign proved the model. Undersea infrastructure is the documented, non-exotic version of the undersea-threat problem: in the Baltic, the Newnew Polar Bear (Balticconnector, Oct 2023), Yi Peng 3 (two cables severed via ~300km anchor drag, Nov 2024), Eagle S (EstLink-2 plus data cables, Dec 25, 2024), and subsequent Vezhen and Fitburg incidents damaged at least eleven cables since October 2023 — prompting NATO's Baltic Sentry mission and a €347m EU subsea-security initiative (Feb 2026). Attribution remains legally fraught (a Helsinki court dismissed Eagle S charges in Oct 2025 for lack of jurisdiction). The lesson for risk officers: UUVs, USVs, and seabed sabotage already generate the continuity, attribution, and insurance problems that a transmedium UAP would — so the exposure must be planned for regardless of the origin debate. The War Zone + 5
Recommendations
Stage 1 — Immediate (wording audit). Shippers, port operators, and their brokers should audit existing hull, cargo, war-risk, and port/terminal BI wordings for three things: (a) the physical-damage trigger — identify every cover that requires physical loss or damage and flag the "non-damage disruption" gap; (b) the war/terrorism/hostile-act definitions and whether an unattributed incursion would be excluded, covered, or fall into a gap; (c) JWC listed-area notice obligations and held-covered/AP mechanics for every regularly transited lane. Benchmark to escalate: if more than one core lane transits a JWC-listed or listing-candidate area, move to Stage 2.
Stage 2 — Near-term (buy the gap). Where non-damage disruption is material, procure specialist Trade Disruption Insurance / port blockage / marine war-risk cover (e.g., the Marsh–TMK $50m port facility or equivalent London-market TDI) that responds without a physical-damage trigger and explicitly names "blockage of waterways," "closure of critical infrastructure," and airspace/waterspace-closure perils. Negotiate port-call-specific and per-transit clauses to limit exposure windows. Benchmark: if AWRP on a key route exceeds ~0.5% of hull value or the JWC issues a fresh listing/notice of cancellation, treat rerouting economics as live.
Stage 3 — Operational continuity. Build the "waterspace/airspace-closure" scenario into business-continuity plans as a named peril alongside chokepoint blockage: pre-negotiate Cape of Good Hope / alternative-routing contracts, model the 10–14 day / $1.2–1.8m-per-round-trip diversion cost, and pre-position GA security arrangements with cargo insurers so a GA declaration does not strand cargo. Benchmark: rehearse against a Suez/Hormuz/Malacca single-point-closure tabletop annually. U.S. Energy Information Administration
Stage 4 — Data and monitoring. Treat sensor ambiguity as the core problem. Adopt null-first incident protocols (log, corroborate with electronic detection, cross-check ADS-B/flight data and satellite passes before escalating). Monitor JWC circulars, AARO annual reports (for any shift from the current zero maritime/transmedium reporting), and EIA/UNCTAD chokepoint data as leading indicators. Threshold that changes everything: an AARO annual report that begins logging corroborated maritime/transmedium cases, or a JWC listing explicitly citing unidentified-object activity, would move this from a wording/BCP exercise to an active-repricing event.
Caveats
Tiering is not uniform. The 2004 Nimitz and 2015 Roosevelt cases rest on multi-sensor military data and sworn testimony but lack publicly releasable raw radar tapes; the 2019 Omaha case has confirmed provenance but unresolved attribution; the 2013 Aguadilla case has been officially reduced by AARO to a prosaic wind-drift explanation and is held below the line. USO/undersea-base lore is mapped but excluded.
Origin is deliberately bracketed. This analysis takes no position on what the phenomena are. The core thesis is that continuity and insurance outcomes are decoupled from origin.
The insurance figures are volatile and dated. War-risk premiums move week to week; the Red Sea rate history (0.05% → 1% → 0.2–0.3% → re-spike) and JWC listings (JWLA-032 Dec 2023 through JWLA-033 March 2026) are point-in-time. Verify live before acting.
Some downstream figures carry uncertainty. The Ever Given ~$540m settlement was never officially confirmed; the ~$9.6bn/day held-up-trade figure is Lloyd's List's acknowledged "rough calculation"; diversion-cost estimates vary by source.
The base rate dominates. The overwhelming majority of "incursions" are prosaic. The value of the analysis is that the continuity playbook is identical whether an incursion is a hobbyist drone, an adversary USV, a sensor artifact, or something genuinely unidentified.
