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A: An undersea cable encapsulates multiple fiber cores in a stainless-steel tube, metallic sheath, and armored steel wires, transmitting data as light pulses. To offset attenuation, optical repeaters are placed roughly every 50–100 km, keeping transoceanic latency to tens of milliseconds.

A: Use public interactive global submarine cable maps for routes and landing stations, and combine them with Hengtong's system/project materials to see in-service and in-build details.

A: There are hundreds of built and in-build systems worldwide, with over a hundred intercontinental trunks and continuing expansion; Hengtong's projects span from near-shore access to long-haul backbones.

A: Yes; professional maps show system status, RFS year, and landing points. Paired with Hengtong's route documents and technical white papers, they clarify risk-avoidance strategies and capacity planning.

A: Near shore, cables use single or double heavy armor and are often buried 1–3 m in the seabed; in deep water they use light armor or no armor to reduce weight. System elements include repeaters, branching units, and a subsea DC power feed-capabilities Hengtong integrates end-to-end.

A: Yes. Modern systems span thousands to tens of thousands of kilometers with ~25-year design lives. Dispersion management, FEC, and optical power control maintain high throughput and low error rates; Hengtong engineers to these long-term KPIs.

A: In high-risk near-shore zones, routes are selected to avoid hazards and the cable is buried; ploughs or ROVs cut and backfill trenches when needed. In deep water, routing avoids rough terrain, and OTDR/electrical tests support monitoring and fault localization; Hengtong covers routing through repair support.

A: Hengtong delivers end-to-end subsea capability-from system design, manufacturing, and repeater integration to laying/landings and O&M with dedicated repair-fleet coordination-supporting both access segments and transoceanic trunks.

A: Typical flow: feasibility and permits → high-density marine survey → route engineering → factory cabling and repeater integration → load-out → lay/bury → shore landing and beach-man/CLS integration → system testing and service. Hengtong provides engineering and equipment at each step.

A: In-demand roles: system/optical network engineers, route and marine survey engineers, cable-lay vessel deck/navigation techs, ROV operators, maintenance and fault localization. Hengtong projects often require optical optimization, maritime compliance, and strong HSE skill sets.

A: Diameter is typically 17–50 mm depending on armor class. From core outward: fiber unit → stainless-steel tube → metallic sheath (also the DC power conductor) → PE insulation → steel-wire armor (possibly multi-layer) → outer jacket. Hengtong tailors specs from light to heavy armor per risk profile.

A: Subsea cables deliver far lower cost per bit, orders-of-magnitude higher capacity, and much lower latency (trans-Atlantic commonly <100 ms). Satellites excel at coverage and backup, but backbone traffic relies on cables-an area where Hengtong invests deeply.