A Global Leader in Subsea, Offshore & Coastal Solutions

From Shore to Seafloor: Deepwater Mooring and Subsea Cable Installation

San Clemente Island, California

Project Overview

PCCI executed the design refinement, fabrication, integration, and offshore installation of a fixed acoustic monitoring array in 1,200 feet of water offshore Southern California. The system required precision placement of a single-line vertical mooring assembly connected to shore via approximately six kilometers of armored fiber optic and power cable.

Engineering scope included:

  • Mooring system design validation and hardware reconfiguration
  • Fabrication of a 12,500-pound anchor and subsurface buoy system
  • Route planning using bathymetric survey data
  • Procurement and termination of armored subsea cable with titanium wet-mate connectors
  • Offshore seawater grounding system design and installation
  • Shore landing integration and commissioning

Installation operations were conducted from a dynamically positioned (DP) vessel to maintain positional accuracy during cable lay and anchor deployment. The team developed a comprehensive cruise plan incorporating deck layouts, lift procedures, contingency planning, hazard analysis, environmental compliance measures, and emergency response protocols.

The project required close coordination among offshore vessel crews, engineers, cable technicians, and shore-based operators to ensure system integrity during deployment and functional testing.

The government’s final evaluation cited PCCI’s technical capability, disciplined execution, and ability to address unforeseen offshore conditions while maintaining schedule performance.

Relevance to Industry:

Applicable to offshore renewables, subsea telecommunications, defense ranges, and fixed oceanographic instrumentation platforms requiring deepwater anchoring and precision cable integration.

Client
Market
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The Challenge
Execution
Structural Sections Modified
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Engineers Deployed
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Classification Compliance
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Class Society Approvals
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Results

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