Big Sunker is a Shoal located in Newfoundland and Labrador and has an elevation of 32 meters.

• Latitude: 47° 23' 35'' North   (decimal: 47.3930555)
• Longitude: 54° 15' 20'' West   (decimal: -54.2555555)
• Topography Feature Category: Shoal
• Geographical Feature: Sunker
• Canadian Province/Territory: Newfoundland and Labrador
• Elevation: 32 meters
• Atlas of Canada Locator Map: Big Sunker
• GPS Coordinate Locator Map: Big Sunker Lat/Long