≈ 1.4 years of tracked time
15.18% of all positions (3 in 20 points)
85% above fleet average (286 days)
#2 of 19 vessels by total days
Speed ≤5 knots (consistent with longline operations)
In Pribilof Zone: 246.4 days
35% below fleet average (66.3%)
#19 of 19 vessels by fishing %
Apparent fishing points in Pribilof zone
Estimated Days: 246.4 days
≈ 8.1 months apparent fishing
41% summer activity (May-Sep)
528.1 days documented - ranks #2 among all tracked vessels
11,825 apparent fishing points in Pribilof zone
15.18% of all positions - #15 by zone percentage
41% summer activity (May-Sep)
219.29 lb/ton
single worst week observed
52.34 lb/ton
across all observed weeks
45.0 lb/ton
average across 19 vessels
What is bycatch? Halibut caught unintentionally while fishing for Pacific Cod. All halibut bycatch represents lost or injured fish and is a conservation concern as it impacts the halibut population and subsistence fisheries. Note: This data does not include mortality rates.
What does the rate mean? For every ton (2,000 lbs) of Pacific Cod caught, approximately 52.34 pounds of halibut were caught as bycatch. This is based on NMFS observer data from weeks when this vessel was actively fishing in the Pribilof Zone.
⚠️ Why only rates, not totals? Total Pacific Cod catch volumes are confidential business information protected by NOAA regulations. Without knowing how many tons of cod were caught, we cannot calculate total pounds of halibut bycatch. We can only present the rate per ton (pounds of halibut per ton of cod). This is a limitation of publicly available data, not a choice.
Important context: These are rates, not total amounts. However, as documented on the mega-longliners page, these industrial-scale vessels are capable of catching many tons of fish per day until their holds are full. Lower rates may indicate declining halibut populations in the area due to cumulative bycatch pressure from all fishing activity, rather than improved practices. All bycatch represents lost or injured halibut that cannot reproduce.
Data source: NMFS observer reports (2013-2024) matched with AIS tracking data to identify fishing activity specifically in the Pribilof Zone (100nm radius around the islands).
Limitations: Based on observed hauls only (not all fishing trips are monitored). Rates can vary significantly by season, location, and fishing conditions.
Pribilof Zone: 100nm radius around Pribilof Islands (critical halibut habitat)
"Apparent Fishing": Speed ≤5 knots, consistent with longline gear deployment
Tracking Points: 11,825 fishing positions documented across 12+ years
Data Limitations: Shows activity when AIS transmitting - actual presence may be higher
All documented positions (2012-2024). Red dots = apparent fishing (≤5 knots), Blue dots = transit/other activity. Circle shows 100nm Pribilof zone boundary.
• Concentration areas show repeated operations
• Red clusters indicate intensive fishing locations
• Zoom in to see individual track segments
Watch vessel movement in Pribilof zone over time. Red trail shows path of apparent fishing activity.
• Click play button to start animation
• Date display shows temporal progression
• Vessel icon shows current position
• Red trail shows path traveled
82 weeks of observed fishing with NMFS bycatch monitoring (2013-2024). Each marker represents one week when this vessel was actively fishing in the Pribilof Zone with observer coverage. Rates shown are pounds of halibut bycatch per ton of Pacific Cod caught.
• What the dots show: Each dot represents when bycatch data was reported for a week of fishing. Dots are placed in the general vicinity of the Pribilof Zone to show the temporal pattern of monitoring, not exact fishing locations.
• Green markers: Weeks with lower bycatch rates (<30 lb/ton)
• Orange markers: Moderate bycatch rates (30-60 lb/ton)
• Red markers: Higher bycatch rates (>60 lb/ton)
• Click any marker to see specific week details
• ⚠️ Important limitations: This represents only observed hauls with NMFS monitoring. Not all fishing activity is monitored. Bycatch reports are matched to weeks when AIS tracking confirmed vessel was actively fishing in the Pribilof Zone. However, AIS coverage may have gaps (transmitter off, signal loss), and vessels may have left the zone before submitting reports. This timeline shows confirmed matches only and may not represent all fishing activity in the area.
Other vessels with similar Pribilof zone presence: