A structural or explanatory diagram; spacing does not represent time, geography or quantities.
| Element | Meaning |
|---|---|
| Shipping | Cargo and personnel must actually make the passage. |
| Protection | Escorts and reconnaissance reduce threats to movement. |
| Ports | Unloading capacity converts arrival into useful delivery. |
| Repair | Damaged ships and equipment need a return path to service. |
What this explains
A successful fleet action does not automatically secure every convoy route. Distance, weather, repairs and port capacity determine whether a tactical result produces sustained access. The Grand Isles campaign therefore requires a maritime support history alongside its landing narratives.