​ALSHIFA GENERAL TRADING LLC

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The ship's Navigation, Automation Parts Exporter

100% GENUINE PARTS / 14 Days Return Policy / 15 Months Warranty

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⚓ SPERRY MARINE MK 1 GYRO CONTAINER TYPE 4991-4000 REV D – WITHOUT SPHERE – USED

MARINE GYRO COMPASS CONVERTER UNIT | SHIP NAVIGATION & HEADING SYSTEM 🧭🚢

🔹 Product Overview

Available for sale is a used Sperry Marine MK 1 Gyro Converter Type 4991-4000 Rev D, a professional marine gyro compass converter unit designed for ship heading transmission and navigation signal processing in commercial marine applications.

This unit is part of the Sperry Marine NAVIGAT gyro compass system and is commonly used onboard commercial vessels for heading data conversion, signal distribution, and integration with bridge navigation equipment including radar, autopilot, AIS, and repeater systems. Documentation references the 4991-4000 series as a “Gyrosphere and Container Mod 10/3” component within the NAVIGAT X MK 1 and CompassNet gyro compass systems.

💡 Condition: Used – supplied WITHOUT SPHERE. Suitable for spare parts, refurbishment, retrofit projects, or replacement applications.

🔹 Product Specifications

• Brand: Sperry Marine
• Model: MK 1 Gyro CONTAINER 
• Type Number: 4991-4000
• Revision: Rev D
• Configuration: Without Sphere
• Condition: Used

🌟 Key Features

✔ Marine gyro compass converter unit
✔ Designed for professional commercial vessel applications
✔ Supports heading signal conversion and transmission
✔ Compatible with Sperry Marine NAVIGAT systems
✔ Rugged marine-grade industrial construction
✔ Suitable for radar, autopilot, and repeater integration
✔ Reliable performance for continuous bridge operation
✔ Ideal for retrofit, repair, or spare inventory use

🧠 Functionality

• Converts and distributes gyro heading information
• Interfaces with bridge navigation equipment
• Supports stable heading signal transmission
• Enhances integration between gyro compass and ship systems
• Assists accurate vessel navigation and steering operations

📦 Package Includes

• 1 × Sperry Marine MK 1 Gyro Converter
• Type: 4991-4000 Rev D
• WITHOUT SPHERE
• Condition: USED

🛡️ Warranty & Shipping

✔ Secure export-quality packaging
✔ Worldwide shipping available
✔ Suitable for marine retrofit and replacement projects
✔ Additional marine navigation equipment available upon request

🔔 Important Note

✔ Gyrosphere is NOT included with this unit
✔ Please verify compatibility with your existing Sperry Marine navigation system before purchase
✔ Review all listing photos carefully for exact condition and included accessories
✔ Used marine equipment may show normal signs of previous onboard service
✔ Professional installation and calibration are recommended

📩 Contact Us

We supply marine navigation systems, gyro compass equipment, AIS units, radar systems, communication devices, industrial automation products, and ship spare parts worldwide.

👉 Contact us for bulk orders, technical support, or additional marine electronics availability.

⭐ Customer Satisfaction

We value your business and strive to provide reliable marine electronics with professional service.

If satisfied with your purchase, please leave ⭐⭐⭐⭐⭐ positive feedback.