Power Cables:
These cables keep the lights on and power various ship systems, from propulsion to lighting.
Examples include submersible pump cables, like the QYEQEY ESP Cable, which powers oil production equipment on vessels.

Communication Cables:
These cables facilitate ship-to-ship communication and transmit navigation data.
Unlike sailors using flags, ships rely on communication cables for smooth sailing and safe voyages. Types in this category include:

• Marine Data Cables
• Marine Telephone Cables

Some marine cables may appear small, but they comprise several components for excellent performance. A typical cable construction includes:

• Conductor: Carries electric current.
• Conductor Screen: Protects the conductor from interference.
• Filler and Binding Tapes: Support and secure components.
• Insulation: Prevents current loss.
• Insulation Screen: Adds an extra layer of protection.
• Separation Tape: Keeps components apart.
• Inner Sheath (Bedding): Provides additional protection.
• Metallic Sheen: Offers electromagnetic shielding.
• Outer Sheath: Protects the cable from the harsh underwater environment.

Electrical performance is crucial for marine cables. Tests include:

• Electrical Conductivity: Ensuring efficient current flow.
• Insulation Resistance: Verifying insulation integrity.
• Dielectric Strength: Assessing resistance to voltage breakdown.
• Measurements to meet required voltage, current, and temperature ratings for marine applications.