For the final approach to a harbour, which chart choice gives the strongest starting evidence?
Short answer
A current chart of suitable large scale that shows the entrance detail, units, datums and relevant notes
A harbour decision needs current authoritative information at a scale that contains the required detail. Enlarging a view cannot create omitted source detail, while familiarity and a route line do not prove currency or suitability. Use the chosen chart to plan and monitor position, hazards, depth and alternatives. Revise this in What a Chart Is For.
Quick check
For the final approach to a harbour, which chart choice gives the strongest starting evidence?