Every pin is a number from the atlas: forty sealed shoal claims, seven hindcast groundings, four predicted strike points, twenty-six resupply lanes graded by the age of their charts.
40sealed shoal claims
4 of 7groundings hindcast blind
28%of Canada's chart pre-1980
1955Naujaat's median survey year
6 stops · ~2 min · seabed relief ×3.5 · click any pin
relief: the seabed, 10 m where CHS has it, model-completed at 100 m elsewhere, exaggerated ×3.5 · water: translucent sea surface · hazard layer: drawn only where the depth map calls the water navigable (>21 m); yellow = P(shallowest point within 500 m < 10.5 m) > 60% · age layer: red pre-1960 → blue post-2016