Sperry Marine Type 5016 Bearing Repeater – Part No. 074880-0001-000

The Sperry Marine Type 5016 Bearing Repeater is an analogue marine compass repeater designed to display heading information received from the vessel’s main gyrocompass system.

The photographed unit is identified by STO No. 074880-0001-000 and Type 5016-0000-00. Its large 360°/10° compass-card display allows bridge personnel to observe the vessel’s heading clearly and take navigational bearings when installed with the appropriate bearing device.

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Product Identification

Manufacturer: Sperry Marine
Product: Gyrocompass Bearing Repeater
Type: 5016 / 5016-0000-00
Stock Number: 074880-0001-000
Interface: RS-422 serial heading-data interface
Display: Analogue 360°/10° rotating compass card
Controls: DIM– and DIM+ illumination controls
Installation: Gimbal-mounted bearing stand or suitable repeater bracket
Manufacturer Location: Hamburg, Germany

Sperry Marine’s official certification documentation identifies P/N 074880-0001-xxx as a bearing repeater used with its approved gyrocompass arrangements, including several NAVIGAT systems. Exact compatibility must be checked against the vessel’s wiring, interface and system revision. View the official Sperry Marine certification document.

What Is a Bearing Repeater?

A bearing repeater receives heading data from the vessel’s master gyrocompass and reproduces that heading at another location. This allows officers to read the vessel’s true heading without being positioned beside the master compass.

The Type 5016 is normally installed on a bridge wing, open bridge area, bearing stand or bulwark-mounted bracket. When used with a compatible azimuth device, it can assist with taking visual bearings of ships, landmarks and navigational objects.

Main Features

• Clear analogue heading presentation
• Large 360° and fine 10° compass-card scales
• RS-422 serial communication interface
• Adjustable day and night illumination
• Gimbal mounting for maintaining a readable position
• Watertight construction for exposed marine locations
• Suitable for use with compatible Sperry Marine gyro systems
• Provision for an azimuth device or telescopic alidade
• Reliable visual heading indication without navigating digital menus

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How the Sperry 5016 Works

Heading information is transmitted from the gyrocompass or data-distribution equipment through an RS-422 serial connection. The internal drive system positions the rotating compass card to correspond with the vessel’s heading.

The DIM– and DIM+ controls adjust the illumination for daytime or night-time navigation. When a suitable PV23 prismatic azimuth device is installed, the officer can use the repeater for taking absolute or relative bearings.

Compatibility and Replacement Information

The Type 5016 bearing repeater is commonly associated with Sperry Marine and C. Plath gyrocompass installations. Relevant systems and related equipment may include:

• Sperry Marine NAVIGAT X MK1 and MK2
• NAVIGAT 100 and NAVIGAT 200
• NAVIGAT 2500 and NAVIGAT 3500
• CompassNet heading-data arrangements
• Type 4894-AD terminal box
• Bearing repeater stands and adjustable brackets
• PV23 prismatic azimuth bearing device

The Sperry 4881-AB is frequently referenced as an older related bearing-repeater model. However, a retrofit should not be treated as automatically plug-and-play. Always verify the part number, supply voltage, RS-422 wiring, terminal box, mounting dimensions and data format before replacement.

Typical Marine Applications

• Vessel bridge and bridge-wing heading display
• Visual navigation and position fixing
• Taking bearings of landmarks and other vessels
• Gyro heading monitoring from an exposed location
• Merchant ships and offshore-support vessels
• Tankers, bulk carriers and container ships
• Replacement or retrofit of older Sperry bearing repeaters

Common Problems and Troubleshooting

Compass Card Does Not Move

Check the power supply, fuse, RS-422 signal, connection polarity, terminal box and incoming gyro heading data.

Incorrect Heading Indication

The compass cards may require synchronisation. Compare the repeater reading with the master gyro before changing configuration or alignment.

Unstable or Intermittent Display

Inspect the communication cable, shielding, connectors and terminal connections. Electrical noise or a weak RS-422 signal can cause unstable operation.

Backlight or Dimmer Failure

Check the DIM controls, internal illumination circuit, supply voltage and related PCB connections.

Condensation Inside the Glass

Condensation may indicate damaged sealing, an incorrectly closed housing or deteriorated cable glands. Watertight units should be opened only by qualified service personnel.

Gimbal Movement Is Stiff

Inspect the trunnions, bushings, mounting ring and bracket. The repeater should move freely without excessive play or jamming.

Maintenance Tips

• Compare repeater heading with the master gyro regularly.
• Keep the glass and compass card clearly visible.
• Inspect cable glands and external seals for damage.
• Protect the repeater when it is not being used.
• Check the gimbal ring and mounting bracket for corrosion.
• Do not lift or carry the unit by its electrical cable.
• Avoid opening the watertight housing onboard.
• Record configuration settings before PCB or firmware work.
• Use trained marine-navigation technicians for calibration and repair.

Why the Sperry 5016 Is Still Used

The Type 5016 provides an immediate and easily understandable heading display. Its large analogue scale is readable in bright daylight and during night navigation, while the gimbal-mounted construction makes it suitable for exposed bridge-wing installations.

It also remains important for vessels operating established Sperry Marine gyrocompass systems where maintaining original compatibility is more practical than redesigning the complete heading-distribution system.

Frequently Asked Questions

Is the Sperry 5016 a master gyrocompass?
No. It is a repeater that displays heading information supplied by a master gyrocompass or heading-distribution system.

What is the part number of this unit?
The photographed unit shows STO No. 074880-0001-000 and Type 5016-0000-00.

Can it replace a Sperry 4881-AB?
It is widely referenced as a later related replacement, but the wiring, mounting arrangement, interface and terminal box must be technically verified.

Does the unit include a terminal box or bearing stand?
These may be separate accessories. Confirm the exact supplied components before ordering.

What information is required for a quotation?
Send photographs of the front, nameplate, rear connections and existing installation. Also provide the gyro model, required quantity, vessel voltage and delivery country.

Short Product Description

Sperry Marine Type 5016 gyrocompass bearing repeater, STO No. 074880-0001-000 and Type 5016-0000-00. Features an analogue 360°/10° compass-card display, RS-422 heading-data interface, adjustable illumination and gimbal-mounted marine construction. Suitable for compatible Sperry Marine gyrocompass and bridge-wing bearing applications.

Manuals and Technical References

• Sperry Marine Type 5016 Analogue Repeater Manual Reference
• Sperry Marine 5016-CA Operation and Service Manual
• Official Sperry Marine CompassNet Declaration

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