In the age of digital transformation, the marine industry is embracing advanced navigation technologies. Among the most crucial components enabling precise navigation at sea is the marine satellite antenna control board. These systems, typically integrated with GPS tracking modules, allow vessels to navigate with accuracy and safety. This article details our recent project involving the reverse engineering and PCBA production of such a system for a Turkish client, emphasizing the technical aspects, PCB design considerations, and the value-added services we provided.

Project Overview

Our client approached us with a unique challenge: their engineering team had departed, leaving behind a legacy system that required urgent upgrading. The existing product—a dual-board marine satellite antenna system—needed to be reverse-engineered to enable future iterations and scalability.

Product Structure

The client supplied two components:

  • Mainboard (150mm x 80mm, 4-layer, FR-4, Lead-Free HASL, matte black finish)
  • Antenna Board (80mm diameter, 2-layer, same finish)

Both boards featured double-sided component mounting, GPS modules, and were encapsulated in a compact marine-grade enclosure.

Reverse Engineering & Chip Decryption

Our first step was to request two physical samples. Upon receiving them, our engineering team assessed:

  • Chip identification through laser markings
  • Pin mapping and circuit tracing
  • Functional zone division (signal, power, I/O)

Chip Program Extraction

The central processing unit on both boards was protected. We successfully performed chip decryption using non-invasive methods, ensuring no physical damage to the original samples. This allowed us to retrieve:

  • Microcontroller firmware
  • Configuration files
  • Embedded logic

We then recreated the full Gerber files, schematic diagrams, and BOM lists based on the extracted data.

Engineering Customizations

After reconstructing the schematic, the client requested minor voltage adjustments and circuit optimizations. Our electrical engineers:

  • Altered resistor networks and voltage regulators
  • Updated the design to improve thermal distribution
  • Ensured EMC compliance for marine applications

The modified files were sent to the client for review. Upon approval, we began producing the PCBA prototypes using SMT lines in our ISO-certified factory.

PCB Design Considerations

Mainboard Features

  • 4-layer stack-up for optimized signal integrity
  • Blind vias for space-saving interlayer connections
  • V-cut panelization for efficient assembly
  • High-density component layout (100+ components)
  • GPS module integration for maritime positioning

Antenna Board Features

  • 2-layer FR-4 base with lead-free HASL
  • Large inductors difficult to source (we offered alternatives)
  • Radial screw mounts for stable device installation
  • Compact capacitor arrays for signal smoothing

Both PCBs featured a matte black solder mask with white silkscreen, enhancing visual clarity during assembly and maintenance.

Component Procurement & Assembly

We handled full BOM kitting and component sourcing. Special attention was paid to:

  • Hard-to-find inductors and switches
  • GPS modules with maritime certification
  • Mechanical elements (screws, mounts) requiring high tensile strength

Assembly Details

  • Double-sided SMT with tight placement tolerances
  • Alignment of toggle switches and capacitors within 0.1mm deviation
  • Visual and X-ray inspection of solder joints

System Integration & Testing

The client provided a finished product shell. Once both boards were installed:

  • The system was tested in a marine simulation environment
  • GPS lock time and signal stability were evaluated
  • Antenna responsiveness was verified under motion

The result was a compact, reliable navigation product fit for rough seas.

Application and Functionality

Working Principle

The marine satellite antenna control system performs the following:

  • Real-time GPS tracking of vessel location
  • Signal reception and orientation via the antenna
  • Data transmission to onboard navigation systems

This ensures smooth and safe maritime travel, even in remote ocean zones.

Use Case

This solution is ideal for:

  • Commercial shipping fleets
  • Offshore oil platforms
  • Maritime research vessels

This project demonstrates how reverse engineering combined with custom PCBA manufacturing can extend the life and functionality of critical marine electronics. By integrating GPS capabilities, robust hardware design, and specialized assembly techniques, we delivered a turnkey solution that exceeded our client’s expectations.

If you have legacy hardware requiring modernization or are developing marine-grade electronics, our team is ready to support you from concept to production.