Submarine Cable Repair · 45.0°N 12.3°W
Meridian Subsea operates a global fleet of cable ships, restoring the submarine fibre-optic backbone within hours of a fault — anywhere on the seafloor, in any depth, in any weather. We hold the line while 99 % of intercontinental data travels beneath the waves.
The Fleet · three vessels, always at readiness
Every vessel in the Meridian fleet is a diesel-electric, dynamically-positioned cable ship: she can hold station over a fault to within two metres in a Force 7 gale, run grapnel operations to eight thousand metres, and splice fibre on deck in the open ocean.
Flagship. Atlantic & Arctic theatre — large-system repair and new lay.
Southern oceans. Shallow-shelf repair, route survey, and burial assessment.
Indo-Pacific trench work. Grapnel recovery and splicing below six thousand metres.
Cable Health · network operations centre
Continuous optical and electrical monitoring across 142 systems. When a repeater shunts or a fibre darkens, the NOC sees it first — usually before the carrier does.
| System & segment | Status | Last C-OTDR | Assigned vessel | Notes |
|---|---|---|---|---|
| Meridian Atlantic-1MA-1 · Sector 3 — Porcupine Abyssal Plain | Fault · repair | 14:22:08Z | MS Meridian Resolution | Shunt fault; both cable ends recovered to deck |
| Aurora LoopSpan D — Mariana fore-arc | Fault · localising | 14:28:41Z | MS Abyssal Pathfinder (en route) | Optical loss 18 dB; C-OTDR pending at sea |
| Coral Sea ConnectorLeg 2 — Queensland Plateau | Degraded | 14:18:55Z | Monitoring only | Repeater noise +0.4 dB; holding under watch |
| Cape Route 3Span C — Agulhas Bank | Survey | 14:05:12Z | MS Tethys Sentinel | Pre-position; burial exposure assessment |
| Pacific Dawn LinkSpan B — Aleutian rise | Operational | 14:31:30Z | — | Post-repair acceptance test passed |
| Northwind ExpressSector 7 — Norwegian Sea | Operational | 14:30:02Z | — | Nominal; all repeaters within tolerance |
| Equiano SpurLeg 1 — Gulf of Guinea | Operational | 14:33:19Z | — | Nominal |
The Work · anatomy of a submarine cable
A repeatered submarine cable survives four kilometres of water pressure, trawl boards and anchor drags for twenty-five years. When it breaks, our jointers strip it back to the doped-silica core and splice it under a microscope on a heaving deck. This is the object we have spent three decades learning to keep lit.
Incident Response · from alarm to restored traffic
Times are typical for a repeatered system fault in open ocean; a shallow-water anchor drag can close in under thirty hours, a deep-trench break can take two weeks. We plan to the worst case.
Line-OTDR supervision flags an abrupt drop in the 10 kV feeding voltage on MA-1 Sector 3. Within a minute the duty engineer has opened the carrier bridge and declared a probable cable fault.
Coherent optical time-domain reflectometry measures backscatter from the broken fibre and converts it to distance: 1,842 km from the Carteret shore-end, plus or minus a cable length. Coordinates are issued to the nearest vessel.
MS Meridian Resolution clears Halifax inside twelve hours of the fault being declared, loaded with 2.4 km of spare armoured cable, two repeaters and a jointing crew. Consortia owners are formally notified of mobilisation.
The ship holds position to within two metres using thrusters and GPS, then begins a series of grapnel runs across the seabed to catch and lift the buried cable to the surface.
The damaged section is cut away. Both healthy ends are winched aboard, inspected, and prepared for splicing. The jointing bay is rigged on the aft working deck.
Jointers fuse each fibre under a microscope, re-terminate the repeater, seal the joint and pressure-test the housing. The new 2.4 km section is paid out between the two original ends.
A subsea plough re-buries the repaired route to protect it from fishing gear and anchors. A post-installation test confirms continuity and repeater health along the full sector.
Both fibre pairs are lit and provisioned back to the carrier's network. Mean time to restore is logged, the joint is warranted for twenty-five years, and the Resolution returns to readiness.
Careers · at sea and ashore
Strip, prepare and fusion-splice optical fibre in the jointing bay; re-terminate repeaters and pressure-test every housing. The craft at the heart of every repair.
Fly work-class ROVs for seabed inspection, cable recovery and burial. Maintain manipulators, cameras and traction systems between dives in the vessel's hangar.
Hold the navigation watch and run DP3 station-keeping over a fault in open ocean. STCW II/2 with DP certificate and cable-ship experience preferred.
Be first to see every fault. Run C-OTDR localisation, declare incidents and drive mobilisation. Twelve-hour shifts, four on four off, at one of our three operations centres.
Don't see your trade listed? We are always glad to hear from welders, marine electricians, hydrographers and software engineers who want to work on the wettest infrastructure on Earth.
Contact · NOC & charter desk
The Network Operations Centre is staffed every hour of every day. For an active cable fault, call the NOC directly — do not wait on email.