đ Large-Scale Longline Vessel Activity in the Pribilof Zone
AIS tracking data documenting large-scale longline vessel operations (2012-2025). Explore the documented activity.
đ The Zone: 100nm radius around Pribilof Islandsđ The Data: AIS vessel tracking (2012-2025) documenting where and when vessels operateâī¸ Methodology: Speed â¤5 knots classified as "apparent fishing" (consistent with longline operations)
Vessels Analyzed
19
Large-scale longline vessels
12,305
Cumulative tracked presence
19.3%
Of tracked positions
Avg. Apparent Fishing
64.2%
Speed â¤5 knots
Vessel Analysis
F/V ALASKAN LEADER
#1 Most Days in Zone
â 1.8 years of tracked presence
% in Pribilof:
21.16%
Apparent Fishing:
56.63%
1 in 5 points âĸ Speed â¤5 knots
Summer Activity:
45.14%
May-September months
Bycatch Rate:
40.0 lb/ton
Halibut per ton of Pacific Cod (114 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V BARANOF
#2 Most Days in Zone
â 1.5 years of tracked presence
% in Pribilof:
14.36%
Apparent Fishing:
42.48%
3 in 20 points âĸ Speed â¤5 knots
Summer Activity:
40.76%
May-September months
Bycatch Rate:
52.9 lb/ton
Halibut per ton of Pacific Cod (81 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V CLIPPER SURPRISE
#1 Highest % in Zone
â 1.2 years of tracked presence
% in Pribilof:
27.97%
Apparent Fishing:
64.18%
More than 1 in 4 points âĸ Speed â¤5 knots
Summer Activity:
49.17%
May-September months
Bycatch Rate:
85.0 lb/ton
Halibut per ton of Pacific Cod (127 weeks observed)
View Data & Maps â
4 interactive maps âĸ 12 years tracked
F/V CLIPPER EPIC
â 1.0 year tracked presence
% in Pribilof:
18.46%
Apparent Fishing:
70.80%
Speed â¤5 knots
Summer Activity:
37.22%
May-September months
Bycatch Rate:
50.6 lb/ton
Halibut per ton of Pacific Cod (122 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V FRONTIER MARINER
â 11 months tracked presence
% in Pribilof:
18.67%
Apparent Fishing:
70.50%
Speed â¤5 knots
Summer Activity:
33.25%
May-September months
Bycatch Rate:
62.3 lb/ton
Halibut per ton of Pacific Cod (129 weeks observed)
View Data & Maps â
4 interactive maps âĸ 15 years tracked
F/V BRISTOL LEADER
â 11.5 months tracked presence
% in Pribilof:
17.54%
Apparent Fishing:
70.01%
Speed â¤5 knots
Summer Activity:
31.59%
May-September months
Bycatch Rate:
34.4 lb/ton
Halibut per ton of Pacific Cod (95 weeks observed)
View Data & Maps â
4 interactive maps âĸ 13 years tracked
F/V BEAUTY BAY
â 12 months tracked presence
% in Pribilof:
27.37%
Apparent Fishing:
62.19%
Speed â¤5 knots
Summer Activity:
37.78%
May-September months
Bycatch Rate:
57.8 lb/ton
Halibut per ton of Pacific Cod (122 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V FRONTIER EXPLORER
â 9.5 months tracked presence
% in Pribilof:
27.73%
Apparent Fishing:
68.40%
Speed â¤5 knots
Summer Activity:
25.8%
May-September months
Bycatch Rate:
57.3 lb/ton
Halibut per ton of Pacific Cod (95 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V US LIBERATOR
â 10 months tracked presence
% in Pribilof:
22.68%
Apparent Fishing:
67.63%
Speed â¤5 knots
Summer Activity:
35.83%
May-September months
Bycatch Rate:
48.4 lb/ton
Halibut per ton of Pacific Cod (91 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V CLIPPER ENDEAVOR
â 8.5 months tracked presence
% in Pribilof:
19.11%
Apparent Fishing:
70.53%
Speed â¤5 knots
Summer Activity:
41.94%
May-September months
Bycatch Rate:
70.6 lb/ton
Halibut per ton of Pacific Cod (99 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V BERING LEADER
#1 Highest Fishing %
â 11.5 months tracked presence
% in Pribilof:
21.53%
Apparent Fishing:
75.83%
3 in 4 points âĸ Speed â¤5 knots
Summer Activity:
37.63%
May-September months
Bycatch Rate:
34.8 lb/ton
Halibut per ton of Pacific Cod (106 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V ALASKA MIST
â 8.5 months tracked presence
% in Pribilof:
14.97%
Apparent Fishing:
57.94%
Speed â¤5 knots
Summer Activity:
26.2%
May-September months
Bycatch Rate:
48.8 lb/ton
Halibut per ton of Pacific Cod (64 weeks observed)
View Data & Maps â
4 interactive maps âĸ 13 years tracked
F/V SIBERIAN SEA
â 10 months tracked presence
% in Pribilof:
18.42%
Apparent Fishing:
72.08%
Speed â¤5 knots
Summer Activity:
37.12%
May-September months
Bycatch Rate:
47.0 lb/ton
Halibut per ton of Pacific Cod (114 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V FRONTIER SPIRIT
â 9 months tracked presence
% in Pribilof:
26.09%
Apparent Fishing:
64.38%
Speed â¤5 knots
Summer Activity:
34.12%
May-September months
Bycatch Rate:
54.7 lb/ton
Halibut per ton of Pacific Cod (84 weeks observed)
View Data & Maps â
4 interactive maps âĸ 14 years tracked
F/V FLICKA
â 8.5 months tracked presence
% in Pribilof:
24.14%
Apparent Fishing:
67.40%
Speed â¤5 knots
Summer Activity:
31.94%
May-September months
Bycatch Rate:
26.0 lb/ton
Halibut per ton of Pacific Cod (53 weeks observed)
View Data & Maps â
4 interactive maps âĸ 10 years tracked
F/V NORTHERN LEADER
â 5.5 months tracked presence
% in Pribilof:
15.17%
Apparent Fishing:
69.23%
Speed â¤5 knots
Summer Activity:
40.35%
May-September months
Bycatch Rate:
22.0 lb/ton
Halibut per ton of Pacific Cod (68 weeks observed)
View Data & Maps â
4 interactive maps âĸ 13 years tracked
F/V ARCTIC PROWLER
â 5 months tracked presence
% in Pribilof:
12.92%
Apparent Fishing:
66.30%
Speed â¤5 knots
Summer Activity:
28.64%
May-September months
Bycatch Rate:
30.3 lb/ton
Halibut per ton of Pacific Cod (61 weeks observed)
View Data & Maps â
4 interactive maps âĸ 12 years tracked
F/V LILLI ANN
â 4 months tracked presence
% in Pribilof:
15.84%
Apparent Fishing:
70.11%
Speed â¤5 knots
Summer Activity:
30.03%
May-September months
Bycatch Rate:
48.4 lb/ton
Halibut per ton of Pacific Cod (72 weeks observed)
View Data & Maps â
4 interactive maps âĸ 15 years tracked
F/V BLUE NORTH
â 2 months tracked presence
% in Pribilof:
7.89%
Apparent Fishing:
74.40%
3 in 4 points âĸ Speed â¤5 knots
Summer Activity:
32.09%
May-September months
Bycatch Rate:
32.9 lb/ton
Halibut per ton of Pacific Cod (30 weeks observed)
View Data & Maps â
4 interactive maps âĸ 10 years tracked
đ Halibut Bycatch Analysis
View comprehensive analysis of halibut bycatch rates in the Pribilof Zone (2013-2025).
Interactive maps, vessel rankings, and year-by-year trends showing high bycatch events.
View Bycatch Analysis â
Data Attribution: Copyright 2025, Global Fishing Watch, Inc.
AIS vessel tracking data used under Creative Commons Attribution-NonCommercial 4.0 (CC BY-NC 4.0) license for non-commercial use.
Global Fishing Watch qualifies all designations of vessel fishing activity as "apparent" rather than certain due to inherent limitations in source data.
Data Coverage: This analysis uses AIS tracking data from 2012-2025. Vessel operational status may have changed since data collection. Some vessels documented here may no longer be in active service in the longline cod fishery.
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