First-principles cost analysis across 15 surveillance platform types. Explore cost-effectiveness, build chokepoint barriers, compare ASW approaches, and map platform economics to the buyers who pay for maritime surveillance.
361 million km2 of ocean. ~100,000 vessels in transit. A ship unobserved for 6 hours could be anywhere in a 160 km radius. Every sensor faces the same core physics problem: the target must produce a signal that exceeds the environmental background. The ocean makes this hard in every domain.
Range scales as the fourth root of power - doubling detection range requires 16x more power. But the ocean makes this worse: sea surface backscatter (clutter) is often stronger than the target return itself. Maritime radar is almost never noise-limited - it is clutter-limited. The K-distribution clutter penalty can be 12 dB, meaning a small boat at 25 km range may be invisible even to a 100 kW X-band radar.
This is why a ship-mounted radar at 30m height covers only ~1,250 km2, while a HALE UAV at 15 km altitude covers 7 million km2 per sortie. Altitude buys radar horizon. Cost per km2-hr varies by 3+ orders of magnitude across platforms.
Electromagnetic signals attenuate within meters in seawater. Only sound propagates at useful range. Detection requires signal excess > 0 dB. Modern quiet submarines radiate 90-120 dB - 30-40 dB quieter than Cold War boats, partially negating the ocean's acoustic advantages.
The SOFAR channel is unique physics. At ~1000m depth, sound energy is trapped by refraction, converting spherical spreading ($20\log R$) to cylindrical spreading ($10\log R$) - a 30 dB advantage at 1,000 km. This is why seabed nodes and deep-towed arrays can detect at hundreds of km, but submarines that stay above the channel can avoid detection entirely.
Every sensor has finite information capacity per unit time. SAR satellites achieve ~1m resolution but revisit only every 1-12 days. OTHR covers 13 million km2 but at 50 km resolution - you can't tell a tanker from a warship. Optical sensors are blocked by cloud cover ~67% of the time.
This is information theory, not engineering failure. The layered architecture (wide-area cueing + narrow-area classification) is a consequence of physics. Three sensors at $P_d = 0.3$ each give $P_d = 0.66$ combined - the mathematical basis for why no single platform works.
AIS is the backbone of vessel tracking - but it can be spoofed (false position), impersonated (false identity), or simply turned off. As of 2025: 3,300+ dark fleet tankers operate with AIS disabled. Spoofing incidents up 200%+ since 2022. 24,000+ vessels experienced GPS jamming in Q1-Q3 2025 alone.
90% of fishing vessels in marine protected areas are invisible to AIS (Science, 2025). The dark fleet grew to 3,300 vessels despite satellite monitoring. Detection without enforcement does not deter - the technology problem is being solved, but the governance problem is not.
These constraints define the economics below. Explore interactive physics visualizations →
Editable parameters update all calculators and the comparator chart in real time. Platforms without inputs (satellites, manned aircraft) use fixed reference data from the report.
Solar-powered autonomous stratospheric aircraft. Edits update the bubble chart in real time.
Cost per km2-hr (x-axis) vs persistence (y-axis). Bubble size represents coverage area - larger bubbles monitor more km2. Click a platform for details and example companies.
Calculate USV barrier requirements and costs vs traditional patrol.
| Approach | Units | Daily Cost | Annual Cost | Ratio |
|---|
Scale a USV fleet and compare to equivalent traditional naval assets.
Nested platform architectures - vehicles carrying vehicles. Configure a mothership with ASVs and AUVs to see how coverage multiplies and cost per km2-hr compresses across domains.
The outermost layer - provides transit, fuel, comms relay, and maintenance for subordinate platforms.
Surface autonomous vessels - fan out 50-100 km, carry radar/AIS/EO, relay comms, recharge AUVs.
Underwater autonomous vehicles - deploy 5-20 km from host ASV, carry hydrophones/sonar/MAD, return for recharge.
| Configuration | Sensor Nodes | Coverage (km2) | Cost/km2-hr | Domains | Multiplier |
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Compare three anti-submarine warfare approaches for a given barrier.
Who pays for maritime surveillance, what they spend, and which platforms serve each buyer. Bottom-up sizing from observable budgets and contracts - not top-down TAM projections.
SAM = Serviceable Addressable Market for an autonomous surveillance startup. Bars show low-high range. Total realistic SAM: $2-5B/year (~10-15% of the $31.4B headline market).