Anschütz Bearing Repeater Compass 133-407 – Complete Marine Technical Guide

Product Identification

Manufacturer: Raytheon Anschütz GmbH

Country of Origin: Germany

Product Type: Bearing Repeater Compass

Model: 133-407

Marine Application:

• Gyro Compass Heading Repeater
• Visual Bearing Measurement
• Navigation Support
• Collision Avoidance
• Coastal Navigation
• Pilotage Operations
• Bridge Wing Navigation

The Anschütz Bearing Repeater Compass 133-407 is a precision marine navigation instrument designed to display gyro compass heading while allowing navigators to take accurate visual bearings of ships, buoys, lighthouses, landmarks, and navigation aids.

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Product Introduction

Modern vessels depend heavily on electronic navigation systems. However, visual bearings remain one of the most reliable methods of verifying a vessel's position and heading.

The Anschütz Bearing Repeater Compass 133-407 combines:

• Gyro heading information
• Bearing measurement capability
• Navigation verification
• Manual position fixing

The instrument is commonly installed on bridge wings where officers can quickly obtain accurate bearings without relying solely on radar or GPS.

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Anschütz Bearing Repeater Compass Systems

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What Is This Equipment?

A Bearing Repeater Compass is an extension of the vessel's main gyro compass system.

Unlike a standard repeater compass, it includes a bearing ring that allows navigators to determine:

• Relative bearings
• True bearings
• Target direction
• Shore reference bearings
• Navigational fixes

The heading displayed originates from the vessel's master gyro compass and is continuously transmitted to the repeater unit.

This ensures accurate heading information is available at locations away from the main bridge console.

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How Does a Bearing Repeater Compass Work?

The system receives heading information from:

• Master Gyro Compass
• Gyro Distribution Unit
• Heading Converter System

The bearing repeater then:

1. Displays vessel heading.
2. Maintains synchronized gyro information.
3. Allows manual bearing observations.
4. Assists navigation officers during maneuvering.

This enables quick verification of vessel position and heading using traditional navigation methods.

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Typical Bearing Repeater Installations

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Main Features

Precision Gyro Heading Display

Receives accurate heading information from the master gyro compass.

Bearing Ring Assembly

Allows precise bearing measurements.

Bridge Wing Installation

Ideal for port and starboard bridge wings.

Heavy-Duty Marine Construction

Designed for harsh marine environments.

Continuous Synchronization

Maintains real-time alignment with the master gyro.

High Visibility Compass Card

Provides easy reading during day and night operations.

Navigation Verification Tool

Supports independent heading verification.

Long Service Life

Widely recognized for durability and reliability.

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Main Components

Compass Card Assembly

Displays heading information.

Bearing Ring

Used for visual bearing measurements.

Gyro Repeater Mechanism

Synchronizes heading information.

Synchro Receiver Unit

Receives heading signals from the gyro system.

Housing Assembly

Provides environmental protection.

Electrical Interface

Connects to the ship's gyro distribution network.

Illumination System

Supports night navigation operations.

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Internal and Operational Examples

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Technical Specifications

Model

133-407

Manufacturer

Raytheon Anschütz GmbH

Compass Type

Bearing Repeater Compass

Heading Source

Master Gyro Compass

Signal Type

Synchro / Gyro Repeater Input

Installation Location

• Bridge Wing
• Navigation Bridge
• Open Bridge Deck

Function

• Heading Repeater
• Bearing Measurement

Construction

Marine Grade Metal Housing

Environmental Rating

Designed for continuous marine operation

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Applications Onboard Ships

Container Ships

Bridge wing navigation support.

Tankers

Pilotage and maneuvering operations.

Bulk Carriers

Visual bearing observation.

Offshore Vessels

Precise heading verification.

Passenger Ships

Bridge wing navigation systems.

Naval Vessels

Navigation and tactical observation.

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Common Problems & Troubleshooting

Heading Not Synchronizing

Possible Causes

• Gyro signal loss
• Synchro receiver failure
• Distribution unit fault

Solution

• Verify gyro output
• Check signal wiring
• Inspect synchro circuits

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Compass Card Stuck

Possible Causes

• Mechanical obstruction
• Internal bearing wear

Solution

• Inspect moving parts
• Clean internal assembly
• Perform mechanical service

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Incorrect Heading Display

Possible Causes

• Gyro error
• Signal calibration issue

Solution

• Compare with master gyro
• Verify synchro alignment

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Illumination Failure

Possible Causes

• Lamp failure
• Power supply issue

Solution

• Replace illumination lamp
• Verify electrical supply

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Excessive Noise or Vibration

Possible Causes

• Mechanical wear
• Loose mounting hardware

Solution

• Inspect mounting structure
• Check internal bearings

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Maintenance Recommendations

Daily

• Verify heading indication.
• Compare with master gyro.

Weekly

• Inspect bearing ring operation.
• Check illumination system.

Monthly

• Inspect housing condition.
• Verify synchronization accuracy.

Quarterly

• Inspect wiring terminals.
• Test gyro distribution signals.

Annual

• Complete mechanical inspection.
• Synchronization verification.
• Electrical system testing.

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Why Ships Still Use Bearing Repeater Compasses

Despite modern GPS and ECDIS technology, bearing repeaters remain essential because:

• Independent heading verification.
• Visual navigation support.
• Collision avoidance assistance.
• Pilotage operations.
• Backup navigation capability.
• Compliance with traditional navigation practices.

Many experienced navigators continue to rely on bearing repeaters during restricted waters navigation and harbor approaches.

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Frequently Asked Questions (FAQ)

What is the purpose of a Bearing Repeater Compass?

It displays gyro heading and allows navigators to take accurate visual bearings.

Does it work independently?

No. It receives heading information from the vessel's master gyro compass.

Where is it normally installed?

Typically on bridge wings or navigation bridge locations.

Can it be used for position fixing?

Yes. Bearings taken from known landmarks can be used for manual position fixing.

Is it still relevant on modern ships?

Absolutely. It remains an important navigation backup and verification tool.

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Short Product Description

The Anschütz Bearing Repeater Compass 133-407 is a professional marine navigation instrument designed to repeat heading information from the vessel's master gyro compass while enabling accurate visual bearing measurements. Widely installed on commercial vessels worldwide, the 133-407 provides reliable navigation support, heading verification, and collision avoidance assistance for bridge officers and navigators.

SM MARINE SERVICE™

Marine Automation & Navigation Equipment Supplier

Available Condition:

• New Equipment
• Used Equipment
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Stock Location:

• Bangladesh
• China

Services:

• Worldwide Shipping
• Technical Support
• Spare Parts Supply
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Contact Information

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Mobile / WhatsApp / Viber: +88 01818 929292

Email: info@smmarineservice.com

Website: www.smmarineservice.com

SM MARINE SERVICE™ supplies Gyro Compass Systems, Bearing Repeaters, Magnetic Compasses, AIS, GPS, Radar, ECDIS, Echo Sounders, Speed Logs, VDR Systems, Marine Automation Equipment, and Navigation Spare Parts worldwide.

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