Key Metrics
Location-Based Traffic Hotspots
Maritime Traffic Grid Map — 2025
Raw AIS GPS points aggregated into 0.5° × 0.5° grid cells (~55 km per side). Each square shows how much vessel activity, congestion, or movement occurred in that area. Data source: NOAA AIS, 2025.
Traffic density
Emissions by Vessel Type
Total CO₂ by Ship Type
Sum of reported annual emissions (m tonnes CO₂) for all matched vessels per type
Average CO₂ per Vessel
Mean annual CO₂ per ship — highlights high per-vessel intensity categories
Activity vs. Emissions Correlation
AIS Tracking Points vs. Annual CO₂ Emissions
Each dot = one matched vessel. X axis = AIS pings in 2025 (activity proxy). Y axis = reported annual CO₂ (m tonnes). Hover for vessel name.
Fleet Composition & Speed
Vessel Count by Ship Type
Number of matched vessels per category
Average Speed by Ship Type
Mean AIS Speed Over Ground (SOG) in knots — 2025
Top CO₂ Emitters — Matched Fleet
Top 20 Highest-Emitting Vessels
Matched on IMO number between AIS 2025 tracking and EU MRV 2024 annual emissions report
| # | Ship Name | Type | CO₂ (m tonnes) | AIS Points (Jan) | Avg Speed (kn) | Active Days |
|---|
Traffic Intensity by Vessel Type (RQ2)
AIS Traffic Points by Vessel Type
Total AIS position reports per vessel category across the full tracked fleet (2025) — which vessel types dominate maritime traffic intensity. Uses the AIS vessel-type grouping (cargo / tanker / passenger / …).
Vessel Speed by Type & Region (RQ4)
Speed Over Ground by Vessel Type
Average and 90th-percentile speed (knots) per vessel category, full AIS fleet, 2025. Median/P90 are approximate (aggregated from per-cell percentiles).
Speed Over Ground by Maritime Region
Average and 90th-percentile speed (knots) per U.S. maritime region, full AIS fleet, 2025. Regions are approximate geographic groupings of grid cells (Alaska omitted — negligible coverage in this feed). Median/P90 are approximate.
Port Congestion & Waiting (RQ3)
Most Congested Regions
Grid cells with the most total waiting time (vessels ≤1 kn for ≥30 min) — a proxy for congestion and anchorage. NOAA AIS 2025.
| # | Region (lat, lon) | Total Waiting (min) | Waiting Events | Distinct Vessels | Avg Wait (min) |
|---|