Sophie Germain

Sophie Germain 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

OperatorOrange Marine
Rolerepair
FlagFrance
Built2023
Length × beam100 m × 18.8 m
Cable capacity1,300 tonnes
DP classDP2 (IMO)

Equipment

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Role and operator

Sophie Germain is a cable repair ship operated by Orange Marine, the subsea cable division of the French telecommunications group Orange. Repair vessels do not lay new cable systems from scratch; instead they locate faults on existing cables, recover the damaged section to the surface, splice in a replacement length, and return the repaired cable to the seabed.

Sophie Germain was built in 2023, making her one of the newest vessels in Orange Marine's fleet.

Cable-handling arrangement

The ship carries up to 1,300 tonnes of cable across three tanks. A forward tank measuring 8. 8 metres in diameter holds 500 tonnes and is suited to the shorter, carefully managed lengths needed during repair operations.

The main carousel — 12 metres in diameter and rated for 800 tonnes — can accommodate longer cable runs, which gives the ship flexibility to handle offshore-wind intra-array cables as well as telecommunications systems. A dedicated recovery tank receives cable brought back aboard from the seabed, keeping retrieved and replacement lengths separate during a job.

Propulsion and station-keeping

Sophie Germain runs on a hybrid diesel-electric drivetrain, with two 1,700 kW Azipod units providing thrust. Azipods are pod-mounted propulsors that rotate through 360 degrees, eliminating the need for a conventional rudder and improving manoeuvrability. The ship holds IMO DP2 dynamic positioning certification — meaning it can hold a precise position on the ocean surface using automated thruster control alone, without anchoring.

DP2 also requires redundant systems so that a single equipment failure does not cause the vessel to drift, which matters when a cable repair operation requires the ship to stay stationary above a splice point for hours at a time.

Fleet context

The dual capability for telecom and offshore-wind work reflects broader demand across Orange Marine's client base, where the same cable-handling techniques apply to both sectors. Sophie Germain's relatively compact 100-metre length and 18.8-metre beam keep her accessible to a wider range of port facilities than larger installation vessels.