René Descartes
René Descartes is one of the roughly sixty cable ships worldwide that keep the internet alive — laying new submarine cables and repairing broken ones, sailing for Orange Marine.
Specifications
| Operator | Orange Marine |
|---|---|
| Role | both |
| Flag | France |
| Cable capacity | 5,800 tonnes |
| Base port | La Seyne-sur-Mer, France |
Equipment
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Role and operations
René Descartes serves a dual function within the Orange Marine fleet: laying new submarine cable systems and maintaining or repairing cables already on the seabed. That combination makes it a versatile asset, capable of shifting between major infrastructure deployments and the more reactive work of fault recovery.
For installation work, cable is loaded into large circular tanks belowdecks, then paid out over the stern or bow sheave in a controlled stream as the ship moves along a planned route. Burial depth, seabed type and water depth all influence how that process is managed at any given point along a route.
René Descartes carries both plough and ROV capability. A cable plough is a heavy steel sled towed along the seabed that cuts a trench and buries cable in a single pass — the preferred method in shallower, workable sediment.
An ROV, or remotely operated vehicle, is an unmanned submersible controlled from the ship; it is used where precise seabed intervention is needed, including fault location, cable recovery for splicing, and burial in areas a plough cannot reach. Together, these tools cover a wide range of seabed conditions and task types.
With a cable capacity of 5,800 tonnes, the ship can carry a substantial length of cable on a single mobilisation, reducing the need for mid-route reloading on longer systems.
Base port
The ship is based at La Seyne-sur-Mer, on France's Mediterranean coast near Toulon. The port has a long association with maritime industry and provides practical access to both Atlantic and Mediterranean cable corridors.