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Navigate the powerful waters of the North Pacific with the authority of the Canadian Hydrographic Service (CHS). Chart 3872 is the vital "road map" for mariners approaching the West Coast of Moresby Island, providing the large-area perspective needed to safely transition from the open sea into the deep-water corridor of Tasu Sound, Haida Gwaii.
The approach to Tasu Sound is one of the most demanding stretches of the Canadian coastline, facing the full force of Pacific weather systems. CHS Chart 3872 is specifically designed to manage these high-stakes environments:
Offshore Bathymetry: Provides essential depth data for deep-draft vessels and commercial shipping as they move from the continental shelf toward the coast.
Hazard Identification: Clearly marks offshore rocks, reefs, and breaking shoals that are often obscured by the heavy swells characteristic of the West Coast.
Radar & Visual Pilotage: Features detailed elevations and coastal configurations of the Queen Charlotte Mountains, allowing for reliable landfalls and orientation in low-visibility conditions.
Seabed Nature & Anchorages: Identifies the composition of the sea bottom, vital for vessels needing to stand off the coast or find emergency holding ground before entering the sound.
As commercial shipping routes and expedition cruises in the Haida Gwaii region continue to expand, Chart 3872 is more vital than ever. Whether you are a captain of a northern supply vessel or a blue-water sailor, this official CHS chart provides the "ground-truth" data required to navigate the transition from the Pacific deeps to the safety of Tasu Sound.
| Feature | Details |
| Chart Number | 3872 |
| Region | West Coast Moresby Island (Haida Gwaii) |
| Publisher | Canadian Hydrographic Service (CHS) |
| Scale | Coastal scale for offshore and approach navigation |
| Application | Commercial shipping, expedition cruising, and heavy-weather transit |
| Key Landmarks | Tasu Sound Entrance, Lomgon Bay Approaches, Moresby Island Coastline |