3978 - Bonilla Island to Edye Passage Nautical Chart

The Hecate Gateway: 3978 - Bonilla Island to Edye Passage

Navigate the powerful transition from the open Pacific into the North Coast archipelago with the professional authority of the Canadian Hydrographic Service (CHS). Chart 3978 is the definitive 1:80,000 scale navigational guide for the western approaches to Chatham Sound, providing the high-resolution data required to safely move through the high-energy waters of the Hecate Strait and Browning Entrance.

Precision for Coastal Landfalls and Outer Island Transit

This region is known for its complex tidal interactions and sudden weather shifts. CHS Chart 3978 provides the "ground-truth" data required for safe pilotage in these technical waters:

• Bonilla Island & Browning Entrance: Features detailed mapping of the critical landfall at Bonilla Island, a major navigational landmark for vessels crossing the Hecate Strait toward the Inside Passage.

• Porcher & Stephens Island Detail: Detailed bathymetry for the western coastlines of Porcher Island and Stephens Island, including the technical entrances to Edye Passage and Bell Passage.

• White Rocks & Hazard Identification: Provides the resolution necessary to identify the treacherous shoals and rock groups, such as the White Rocks, that define the outer fringe of the North Coast.

• Tidal Influence & Current Awareness: Explicitly marks drying reefs and underwater pinnacles, vital for situational awareness in an area where massive tidal volumes enter and exit the Sound.

The Professional Standard for Outer Coast Navigation

As the primary navigational resource for commercial fishers, tug operators, and long-range cruisers transiting between the central coast and Prince Rupert, the reliability of Chart 3978 is paramount. Specifically designed to meet the rigorous requirements of marine navigation, this official CHS chart delivers the accuracy and detail needed to navigate the wild western edge of the North Coast with total confidence.