
Explore the deep, protected reaches of southern Haida Gwaii with the professional authority of the Canadian Hydrographic Service (CHS). Chart 3857 is the definitive 1:20,000 scale "road map" for mariners, providing the granular detail required for safe passage into Louscoone Inlet, a vital harbor of refuge and biological hotspot on the southwestern shore of Moresby Island.
Louscoone Inlet is a narrow, fjord-like indentation that offers critical protection from the high-energy Pacific Ocean. CHS Chart 3857 provides the "ground-truth" data required for safe navigation in this technical environment:
High-Resolution Inlet Mapping: Features the detail necessary to navigate the entire length of the inlet, from the exposed entrance to the sheltered waters at the Head of Louscoone.
Detailed Shoreline Configuration: Precision mapping of the rugged coastlines, identifying elevations, intertidal zones, and the configuration of small bays and coves.
Seafloor & Anchorage Intelligence: Explicitly shows the nature of the sea bottom (rock, sand, or mud) and precise water depths, essential for securing a safe anchorage in varying weather conditions.
Hazard Identification: Marks all drying reefs, submerged rocks, and aids to navigation, ensuring situational awareness for eco-tourism vessels, research boats, and recreational cruisers.
As the primary navigational resource for one of the most secluded and ecologically diverse inlets in Gwaii Haanas, the reliability of Chart 3857 is paramount. Specifically designed to meet the rigorous requirements of marine navigation, this official CHS chart delivers the accuracy and detail needed to explore the southern frontier of Haida Gwaii with total confidence.
| Feature | Details |
| Chart Number | 3857 |
| Region | Pacific Coast (Southern Haida Gwaii / Moresby Island) |
| Scale | 1:20,000 (High-Resolution Detail) |
| Dimensions | 24" x 38" (Standard Paper Size) |
| Publisher | Canadian Hydrographic Service (CHS) |
| Key Coverage | Louscoone Inlet, Head of Louscoone, Southwest Moresby Island |
| Compliance | Meets official carriage requirements for safe marine navigation |