Great Circle vs Rhumb Line: Which Route Makes Sense at Sea?
This guide exists because many users have heard the terms, but not many consumer apps explain why they matter in a practical planning workflow.
Great Circle
Shortest path over the earth
Rhumb Line
Constant-bearing route logic
Practical use
Choose based on trip and conditions
Great Circle saves distance
Over long legs, Great Circle can materially change the route shape and distance outcome.
Rhumb Line stays simpler
For many shorter or coastal scenarios, constant-bearing thinking remains easier to reason about operationally.
The best tool supports both
Waypoint treats both as planning tools, not one as a historical curiosity.
Choose the route logic that fits the trip
After this guide, a reader should understand when Great Circle saves distance, when Rhumb Line keeps things simpler, and why supporting both matters in a serious marine planner.
Next step
See how Waypoint handles route planning
The product page shows how these planning concepts fit inside the actual route workflow.