🔍 Key Concepts

• Using a range and tangent bearing to fix a position relative to a small island feature • How to transfer a plotted point to the chart and then determine charted depth from nearby soundings and contours • Understanding how distance offshore affects depth around a small island or shoal

💭 Think About

• Once you plot 2.0 miles from the north end of Falkner Island on the 102°T left tangent, where does that place your vessel relative to the island (north, east, south, etc.)? • After you mark your position, what depth contour lines are closest to that point, and what nearby sounding(s) can you read? • Is your plotted position in a region of quickly changing depths (steep bottom) or more gradual change, and how does that affect which nearby sounding is most representative?

✅ Before You Answer

• Verify that you are using the north end of Falkner Island as the correct reference point for the range circle. • Make sure the left tangent bearing is drawn correctly from your vessel toward the island’s outline on the chart. • Confirm that the depth you choose matches the nearest sounding/contour at your plotted position, not at the island shoreline or another feature.