Reliable navigation

Northrop Grumman Sperry Marine is a recognised leading supplier of magnetic compass systems and accessories for the marine industry. The magnetic compass systems of Northrop Grumman Sperry Marine meet the extreme marine and weather conditions and include aluminium alloy binnacles and the JUPITER Flat Glass Magnetic Compass.

Key Benefits of the Magnetic Compass:

  • Easy to install and ease of use
  • Cost effective
  • Type approved by Germanischer Lloyd


Northrop Grumman Sperry Marine manufactures and supplies its magnetic compasses and binnacles. The wide range of equipment offered by the comprehensive Northrop Grumman Sperry Marine Magnetic Compass Systems includes aluminium alloy binnacles, the JUPITER magnetic flat glass compass, a flux-gate pick-off with an integrated sine/cosine interface, bypass arrangements, azimuth devices and magnetic compass autopilots (TMC). All of these products are manufactured to high standards for highly reliable navigation.

Marine Compass System Components

  • NAVIPOL Magnetic Compass Binnacles
  • JUPITER Flat Glass Magnetic Compass
  • Flux-Gate
  • Universal Digital Repeater

The magnetic compass can be used either stand-alone or in combination with any of the gyrocompass systems.

All Northrop Grumman Sperry Marine magnetic compass accessories are serviced 24/7 by our global network of service engineers.


The NAVIPOL Magnetic Compass Binnacles

Magnetic Compass


A wide range of Marine Magnetic Compass system products are manufactured by Northrop Grumman Sperry Marine, including a flux-gate pick-off with an integrated sine/cosine interface, by-pass arrangements, azimuth devices and magnetic compass autopilots (TMC).

All products are manufactured to Northrop Grumman Sperry Marine’s world-renowned high standards.

JUPITER Magnetic Compass

Northrop Grumman Sperry Marine manufactures the legendary JUPITER magnetic flat glass compass and its own aluminium alloy binnacles. NAVIPOL models include the NAVIPOL I steering and bearing compass reflector binnacle with a by-pass arrangement, NAVIPOL II bearing compass binnacle, NAVIPOL III steering and bearing compass binnacle with window.

All binnacles are supplied with a JUPITER Magnetic Compass, a dimmer and B, C, D and Flinder’s bar correctors. Optional features included a protective cover, set of additional B and C compensating magnets and azimuth device PV 24. Read more about the JUPITER Magnetic Compass.

NAVIPOL Specifications

Standard power supply 230 VAC or 115 VAC or 24 VDC
Emergency power supply 230 VAC or 115 VAC or 24 VDC
Weight 60 KG


NAVIPOL I Standard & Steering Compass Reflector Binnacle. The length of the reflector tube is determined by a + b. Reflector tubes are available in the following lengths: 1000, 1500 and 2000 mm
NAVIPOL II Standard & Steering Compass Binnacle
NAVIPOL III Steering Compass Binnacle with Window
NAVIPOL U Standard & Steering Compass Reflector Binnacle with a Bypass Arrangement

Flux-Gate Unit

Magnetic Compass

The Northrop Grumman Sperry Marine flux-gate is an in-house development which combines modern electronic technology with SMD manufacturing techniques to produce a very compact unit which also incorporates a fully integrated sine / cosine interface.

Flux-Gate Specifications

  • A combination of modern electronic technology and SMD manufacturing techniques
  • Fully integrated sine/cosine interface
  • Power requirements 12 V ± 20%
  • Power rating 40mA
  • Output voltage ± 3.75 VDC (variable ± 1.5 V to ± 4 V)
  • Adapter kit available for attachment to non Sperry Marine magnetic compasses
  • Type approved in accordance with the Marine Equipment Directive (MED) 96/98/EC in combination with a JUPITER magnetic compass
  • Dimensions: body 70 mm Ø, height 34 mm, mounting base 80 mm Ø

JUPITER Magnetic Compass

Magnetic Compass


The JUPITER is a bearing compass, steering compass, reflector compass and overhead compass for large vessels. A “class A” Magnetic Compass with a card diameter of 180 mm.

Type approved Magnetic Compass

The Magnetic Compass meets ISO 449 standards and is type approved in accordance with the EC Council Directive 96 / 98 / EC. Further type approvals for many other countries are available.

JUPITER installed in NAVIPOL binnacles

The JUPITER compass may be installed in all NAVIPOL binnacles and its accuracy is better than 0.5°. Options for the JUPITER include: flux-gate pickoff, shadow pin, wooden transport box, replacement parts kit, azimuth device.


Universal Digital Repeater

Magnetic Compass


The Universal Digital Repeater, in conjunction with a Sperry Marine fluxgate sensor, fitted to a compatible magnetic compass and in combination with NAVITWIN IV and/or NAVIPILOT 4000, indicates the corrected magnetic compass heading.

Console or Watertight Housing with bracket

The Universal Digital Repeater is available as a console version and in a watertight housing with bracket attachment and is Type-approved in accordance with the Marine Equipment Directive (MED) 96/98/EC

Vibration 2 Hz to 100 Hz to IEC 60945
Temperature range -25° C to +70° C
Protection grade Rear IP32 to DIN 40050, Front IP 65 to DIN 40050


Power 18 to 36 VDC
Power consumption 5 W
Signal input One RS422 input


NMEA 0183 Heading gyro, heading magnetic, roll, pitch, rate of turn, X-rate, Y-rate, water speed, ground speed, transverse water speed, transverse ground speed, total / daily miles, wind speed, wind angle, rudder angle, depth, air temperature, water temperature, time, revolutions per minute, heave
Lehmkuhl Heading
Course to Steer Indicator Steer
Status Input Opto-coupler, rating 24V / 10 mA freeze mode, 180° heading change mode
Signal Output One RS422
Protocols VDR Specified for the Sperry Marine Voyage Data Printer
Status output Open collector, rating 50 V / 500 mA. Status change according to speed input (threshold can be set in the setup menu)


Front plate 96 x 96 mm to DIN Standard
Depth 145 mm (including cable clearance behind housing)


Width, Height, Depth 158 mm, 155 mm, 154 mm (including cable clearance behind housing)
Compass Systems