Corsair Canyon lies at the far northeastern corner of Georges Bank, near the US-Canada maritime boundary (the Hague Line). It is the longest of the canyon runs for New England boats and a genuine expedition, but the rich, cold-edge water can hold bluefin and the rest of the canyon slate, yellowfin, bigeye, marlin and swordfish.
The canyon
Fish the edge and the fingers at this far corner of the bank. Its position near the international boundary means you must know exactly where the line is and stay on the correct side of it.
How to fish it
Troll the edge, chunk overnight, and deep-drop for swords, on a trip planned for multiple days offshore.
Mind the boundary Corsair sits near the US-Canada maritime boundary (the Hague Line). Fishing across the line into Canadian waters has serious legal consequences, so know precisely where the boundary is and stay well on the US side unless properly permitted.
Canyon-run safety The canyons are a long run into deep, open ocean, usually an overnight or multi-day trip far beyond help. Go in a capable, well-found boat, watch the weather window closely, carry proper safety and communications gear (EPIRB, life raft, redundant electronics), and file a float plan. This is serious offshore fishing.
Regulations Tuna are federally managed highly migratory species requiring an HMS permit, with category, size and retention rules that change through the season. Confirm current rules with NOAA Fisheries HMS before fishing.