4.1.1 — Maritime Intelligence — maturity: live

Vessel Detection & Identification

Detecting, identifying and classifying every vessel in a defined ocean area, by fusing satellite AIS reception with SAR and optical imaging.

Vessel detection and identification is the foundational layer of every maritime application built above it: domain awareness, fisheries enforcement, sanctions monitoring, port logistics, insurance pricing. The basic task is to know — at any moment, in any weather, day or night — what is moving in a defined patch of ocean and what each contact is.

Three sensor modalities do the heavy lifting. Satellite Automatic Identification System (S-AIS) receives the VHF self-reporting beacons that vessels above 300 GT are required to transmit under SOLAS Chapter V. Synthetic-aperture radar (SAR) sees through cloud and at night, returning a hard backscatter signature for any metal hull above a few metres. Optical imagery — visible and near-infrared — adds vessel-class confirmation, paint scheme reading and visual cargo inspection in good light. The state of the art is to fuse all three: AIS provides cheap continuous coverage; SAR catches what AIS misses, including AIS-off vessels; optical adds the visual confirmation a human analyst trusts. For markets like India, the GCC and African coastal states, the sovereignty stakes are real — most operational AIS aggregation today is run by foreign commercial firms, and SAR tasking over national EEZs is a contested commercial arrangement.

What matters

The foundational data layer for every maritime application above it — fisheries, security, ports, insurance, trade intelligence.
AIS alone is no longer sufficient: a meaningful share of vessels in any contested water either don't transmit AIS or actively spoof their position.
SAR is the decisive tool for all-weather, all-light detection — and SAR tasking access is a national-stakes question for coastal states.
Performance is defined by revisit time and minimum detectable vessel length, not just sensor resolution.

Sovereignty score: 8/10 — Critical.

Every coastal state with an EEZ — India 2.4M km², KSA 230k km², Egypt 175k km² — has a direct national interest in knowing who is in its waters.
Operational AIS aggregation today is dominated by foreign commercial providers (Spire, Kpler / ExactEarth, ORBCOMM); SAR tasking is dominated by ICEYE, Capella, Umbra, Synspective, Airbus, Maxar.
India's ISRO RISAT and Egypt's EgSA programmes show the path to sovereign capability is feasible at smallsat scale; it isn't yet at operational scale for most middle-power states.

Reference architecture

Payload: S-AIS receiver (VHF, dual-channel, advanced collision-resolution algorithms) for the AIS layer. X-band SAR for the all-weather layer. Optional optical imager for visual confirmation.
Bus class: 6U–12U for AIS-only nanosats. 100 kg ESPA-class smallsat for SAR (X-band SAR antennas of useful aperture do not fit in CubeSat envelopes today — this is a physics exception to the nanosat default).
Orbit: 500–600 km Sun-synchronous LEO for both. AIS: 30–60 satellites for global hourly revisit. SAR: 12–24 satellites for daily revisit over priority EEZs; more for sub-hourly.
Ground segment: Commercial GSaaS (KSAT, Atlas Space, Leaf Space) for the demonstrator and early operational phase. Sovereign ground capability for a fully national system.
Software & data
Latency
Cost band
Lead time

References

Global Fishing Watch — Technology overview — describes the AIS / SAR / VIIRS fusion stack for vessel detection at global scale.
EMSA — Integrated Maritime Services — the European Maritime Safety Agency's operational vessel-monitoring stack, used by all 27 EU coastal states.
IMO — Automatic Identification System (AIS) — the carriage requirements and standards under SOLAS Chapter V.
Global Fishing Watch — A Radar-Illuminated Ocean — explains the operational SAR pipeline processing ~400 scenes/day with ~20,000 daily detections.