Gyro compasses

A gyrocompass finds true north by using an (electrically powered) fast-spinning wheel and friction forces in order to exploit the rotation of the Earth. Gyrocompasses have two main advantages over magnetic compasses:

  • they find true north, i.e., the direction of Earth's rotational axis, as opposed to magnetic north,
  • they are far less susceptible to external magnetic fields, e.g. those created by ferrous metal in a ship's hull.

All ships of 500 gross tonnage and upwards shall have a gyro compass, or other means, to determine and display their heading by shipborne nonmagnetic means and to transmit heading information for other navigation equipment.

 


Gyrocompass PGM-C-009

Gyrocompass PGM-C-009 is designed to meet the most needs of the modern marine market. Highly accurate performance, small size, short settling time make it suitable for any type of vessel.

Gyrocompass provides the following data:

  • heading against the geographical meridian at the vessel speed up to 90 knots, latitude up to 80°, roll and pitch angles up to 50°;
  • rate of turn;
  • information about operation mode and failures.

Gyrocompass PGM-C-009 complies with requirements of IMO A.424(XI), A.821 (19), MEC 945-96, ISO 8728-1987.

CONFIGURATION:

Gyrocompass has a monoblock design. The compass casing is made of a foamed polyurethane and has a window on the top for the compass card. If necessary, built-in Control Unit may be mounted remotely, at the distance up to 100 meters away from gyrocompass.

The heart of the gyrocompass is a dynamically-tuned gyroscope - a very accurate sensor that ensures a follow-up speed up to 200°/ñåê.

FEATURES:

  • efficient one box design
  • small size and versatility
  • automatic start-up and alignment against the meridian
  • short initial settling time
  • fast settling with the preset heading
  • high reliability
  • high static and dynamic accuracy (latitude and speed compensation, automatic compensation of temperature drifts)
  • easy installation and adjustment, built-in testing
  • simple maintenance (no compass fluid, extra cooling and heating are not required, no periodic determination and compensation of azimuth drift, simplified methods of horizontal drift determination and compensation)
  • adjustment of scale illumination brightness
  • ecological safety

Specification:
Settling Time:≤45 min within 0.7°
Settle Point Error:<±0.2 sec φ°
Dynamic Accuracy:<±0.6 sec φ°
Settle Point Repeatability:<±0.2 sec φ°
Follow-up Speed:≥200°/c
Input Voltage:24 (18-36) VDC
Power Consumption:
start-up
operation

50W
25W
Weight:15.5 kg
Dimensions:288 × 240 × 329 mm
Estimated service life:90000 hours
Outputs:
Step:1 × (5V TTL), 6 steps per degree
Resolver:1 × 3V 400Hz
Serial Data:4 × RS422, NMEA-0183
2 × RS232, NMEA-0183
1 × ROT ±20°/s (±10V)
Status/Alarm:5V TTL power fail/gyro fail
5V TTL system ready
Inputs:
Latitude:NMEA-0183, via RS232 or RS422 from GPS
Speed:Pulse or contact closure at 100, 200 or 400 per nm from log NMEA-0183 via RS232 or RS422 from log
Operating environment:
Temperature:
operating
storage

-15 to +55°C
-60 to +80°C
Shock:10 g

 


MERIDIAN SURVEYOR Gyrocompass

The new Meridian Surveyor boasts a wide range of interfaces to enable use on any marine vessel. The unit utilises a DTG gyro element which provides exceptional performance with an accuracy unmatched by even the latest fibre optic designs.

Unlike conventional spinning mass gyrocompasses, the Meridian Surveyor uses a dry tuned element (DTG) that removes the need for routine maintenance thereby significantly reducing cost of ownership. Hence the Meridian Surveyor provides reliable, maintenance free operation with a MTBF in excess of 30,000 hrs. Calibration is likely to be the only required expenditure during this period unlike the large element replacement costs associated with most gyrocompasses.

Gyrocompass Meridian Surveyor complies with the requirements of IMO A 424(XI), IMO A 821 (1bv9), BS EN 60945, BS EN ISO 8728.1994, BS 6217. 1981 CE Marking, Electromagnetic Compatibility (EMC) Directive and the Marine Equipment Directive 96/98/EC.

Specification:
Display type:360° Compass Card and VFD Display
Settle point:0.1° secant latitude
Static accuracy:0.05° RMS secant latitude
Dynamic accuracy:0.2° secant latitude
Follow up speed:200°/sec.
Settling time:<40 minutes, to within 0.7°
Latitude Input:Automatic - via RS232 or RS422, NMEA 0183 from GPS or Manual
Speed Input:Automatic - via RS232 or RS422, NMEA 0183 from Log, or pulse / contact closure at 100, 200 or 400 per NM from Log or manual
Latitude Compensation:80°N to 80°S
Speed Compensation:0 - 90 knots
Gimbal Limits:± 45° Pitch and Roll
Outputs Format:
"S" type:Step by Step (5V TTL) 6 steps/1º
Synchro:1 x 26V, 400Hz, 360° (1:1 ratio) 11.8V line to line
Serial Data:5 x RS 422
5 x RS232
5 x 20mA loop
Analogue:R.O.T. ±20°/sec. (±10mA)
1 x 5V TTL system ready
1 x 5V TTL power fail / gyro fail
Input Voltage:24VDC (18 - 36VDC)
Start up current:1.8A at Switch on
Dimensions:344 x 267 x 440 mm
Weight:15,5 kg
MTBF:30 000 hours
Service intervals:No scheduled maintenance,
Calibration recommended every 2 years
Warranty:12 months parts and labour international warranty
Operating conditions:
Operating Temperature:-15°C + 55°C
Storage Temperature:-25°C to + 80°C
Shock:10 g

 


Unicont DI-121 Digital Indicator

Device DI-121 is meant for displaying of received data in digitals from different signal sources with voltage output or digital messages NMEA 0183 format. Device can have 1, 2 or 3 indicators. Each indicator has an input for signal receipt as direct voltage and input for NMEA 0183 message receipt. The device has built-in dimmer for smooth brightness regulation. Special software provides device’s calibration for any signal source and tuning all settings of the device.

Specification:
Baudrate:up to 115200
Power voltage:9...36 VDC
Maximum power consumption:no more than 3 W
Isolation:Galvanic isolation from PS circuit
Protection from reverse polarity:polarity is not important
Input of direct voltage measurement:up to 30 VDC
Dimensions:
×1
×2
×3

113 × 115 × 26 mm
209 × 115 × 26 mm
305 × 115 × 26 mm

 


Unicont DR-109 Universal digital repeater

Universal digital repeater DR-109 is intended for NMEA 0183 messages visual display (received from NMEA-sources). Easy tuning to any kind of NMEA data (speed, rate of turn, heading, traveled distance) is the main DR-109 advantage. Two available serial interfaces of the device (RS-232 and RS-422/485) lighten its integration.

  • Type approved by the Russian Maritime Register Of Shipping
  • More than 20 displayed NMEA 0183 messages
  • Up to three separate NMEA 0183 data types on the built-in LED display
  • Separate ROT data on the built-in LEDs bar
  • Embedded dimmer
  • 2 input channels (RS-232/RS-422 interfaces)
  • 10 stored user’s profiles options

Specification:
Interfaces type:RS-232 and RS-422 (2 input channels)
Baudrate:up to 115200 bps
Input NMEA 0183 messages:$xxDBK, $xxDBT, $xxDPT, $xxHDG, $xxHDT, $xxMTW, $xxMWV, $xxROT, $xxRSA, $xxVBW, $xxVDR, $xxVHW, $xxVLW, $xxWCW, $xxVPW, $xxVTG, $xxVWR, $xxZDA, $xxZFO, $xxZTG
Power voltage:18...36 VDC
Dimensions:206 × 196 × 42 mm
Weight:1,5 kg
Temperature:
operating
storage

-20...+55°C
-40...+70°C
Protection:IP 22 (optional IP 44)

 


Unicont DR-209 Universal digital repeater

Universal digital repeater DR-209 is intended for NMEA 0183 messages visual display. Embedded graphic LCD display provides comfortable use of the device. DR-209 can displays NMEA data in digital, graphical and graph modes. The device displays up to 4 different kinds of data on one screen in the digital mode. Also user can switch between 5 customizable screens (each screen can operate in own mode). One of configurations DR-209BP can be operated together with BMU-126 Battery Measuring Unit.

  • Type approved by the Russian Maritime Register Of Shipping
  • Supports 29 types of NMEA 0183 messages
  • 5 customizable screens
  • Displaying up to 4 types of data on screen in digital mode
  • Graph, graphical and digital screen modes
  • 4 input channels (RS-422/485)
  • 10 customizable alarm conditions
  • Embedded display’s brightness and contrast regulators
  • Integrated adjustable NMEA 0183 data combiner

Specification:
Interfaces type:RS-422/485 (4 input/output channels)
Baudrate:up to 115200 bps
Parity:no/even/odd
Stop-bits:1/2
CRC-checking:on/off (adjustable)
Output data:combined data from input channels according to user’s settings
Input NMEA 0183 messages:$xxAPB, $xxBWC, $xxBWR, $xxDBK, $xxDBS, $xxDBT, $xxDPT, $xxGGA, $xxGLC, $xxGLL, $xxGTD, $xxHDT, $xxHDG, $xxHDM, $xxMDA, $xxMTW, $xxMWV, $xxRMB, $xxRMC, $xxVBW, $xxVDR, $xxVHW, $xxVTG, $xxVWR, $xxVWT, $xxXTE, $xxZDA
Power voltage:10..36 VDC
Dimensions:211 × 117 × 63,5 mm
Weight:2 kg
Temperature:
operating
storage

-20...+55°C
-40...+70°C
Protection:IP 22 (optional IP 44)

 


Unicont DR-309 Digital mechanical repeater

Digital mechanical repeater DR-309 is intended to display current ship’s heading on built-in fly received from NMEA 0183 sources such as gyrocompasses, GPS compasses, THT compasses and magnetic compasses.

Device has 3 NMEA 0183 inputs to connect up to 3 compasses simultaneously. User can switch heading sources manually with built-in keyboard. The current source of a heading is displayed by highlighting of a corresponding label on the forward panel of the device. Also current heading value displayed on digital LED indicator.

  • Displaying of current heading value on built-in digital LED display
  • Adjustable NMEA 0183 settings (header, baudrate, stop-bits, parity, CRCchecking)
  • Individual settings for each input channel
  • Panel and desk-top mounting
  • Adjustable scale backlighting
  • Indication of current data source

Specification:
Interfaces type:3 × RS-232/422/485
Baudrate:up to 115200 bps
Parity:no/even/odd
Stop-bits:1/2
Supported NMEA messages:HDT, HDG, HDM
Diameter:115 mm
Fly precision:
Positioning accuracy:0.1°
Initial heading setup:not required
Maximum rate of turn:60°/s (3600°/min)
Power voltage:9...36 VDC
Dimensions:206 × 196 × 42 mm
Weight:2 kg
Temperature:
operating
storage

-20...+55°C
-40...+70°C

 


Yokogawa CMZ900

  • A modular design saves the space. Master compass can be integrated in the autopilot steering stand.
  • Dual-unit model for extra reliability.
  • Manual and automatic speed error correction.
  • External heading sensor can back up the heading outputs.
  • Heading deviation monitoring.
  • Steering mode input inhibits the unusual operation of Master compass and secure the current heading information during auto-steering mode.
  • Serial data output IEC 61162-2 (high-speed transmission).
  • A unique anti-vibration mechanism enhanced by the velocity damping effect of high viscous oil, provides superior damping of vibration and decoupling of shock at sea.
  • A small and lightweight container enhances the follow up speed. The gyrocompass reading changes smoothly and does not lag when a small ship rapidly changes course.
  • Easy maintenance and long maintenance periods
  • Titanium capsule and electrodes are employed at lower hemisphere of Gyrosphere. Purity is maintained inside of the container, and maintenance interval is then longer-dated.
  • The container is divided into two pieces at bottom when overhauled. Ship’s crew can replace Gyrosphere in case of emergency.
Set of supply:
  • Master compass MKM026 (2 x master compasses for CMZ900D)
  • Control box MKC326 (for CMZ900S) or MKC327 (for CMZ900D)
  • AC adapter MKR027
  • Dual AC adapter MKS066 (for CMZ900D)
  • Switch Unit MKR027 (for CMZ900D)
Options:
  • Steering Repeater Compass MKR056
  • Repeater compass MKR050 with Connection Box MKN019
  • Rate Of Turn indicator MKR302 with dimmer box MKD002
  • Tilting Bracket KX213 for Repeater compass MKR050
  • Horizontal Bracket KX201A for Repeater compass MKR050
  • Horizontal Stand KX223A for Repeater compass MKR050
  • Horizontal Stand Cover KX607A
  • Shading Circle KX605
  • Repeater Cover KX607
  • Azimuth Circle MKX617
  • Dual Channel Recorder MKR181A
  • Course Recorder MKR101A
  • Operation Unit MKR040
  • Serial Distributor MHB306 for Serial output (IEC61162-1/-2)
  • Distribution Box KN054 for Steppers
  • Universal Data Display MHR110A
  • Assist Monitor MHR112
  • Universal Data Display MHR120

Specification:
Settling time:Within 5 hours
(2 hours for practical use)
Accuracy:
Static condition:
Dynamic condition:

±0.25° × sec (latitude)
±0.75° × sec (latitude)
Follow up accuracy:<0.1°
Maximum follow up speed:30° /sec
Environment (Normal Use):
Mechanical freedom:±40° (roll angle)
±40 (pitch angle)
Permissible vibration:
0 - 8.3Hz
8.3 - 25Hz
25 - 50Hz

<3 mm
<0.35 mm
<0.1 mm
EMC:IEC 60945 4th edition
Ambient operating temperature:
Protected equipments
Master compass (Operating)
Bering repeater compass

-15 to +55°C
-10 to +50°C
-25 to +70°C
Power Supply
Main power:
Backup power:

100V to 220V AC, 50/60Hz
24V DC (20V to 30V DC)
Power consumption at AC drive:
Starting:approx. 250VA + 12VA × number of repeater compasses (Max. 8)
Operating:approx. 200VA + 12VA × number of repeater compasses (Max. 8)
Power consumption at DC drive:
Starting:approx. 10A + 0.35A × number of repeater compasses (Max. 8)
Operating:approx. 7A + 0.35A × number of repeater compasses (Max. 8)
Input Signal Specification:
Serial interface:
Input:
Transmission convention:
Signaling rate:
Sentence:

3 circuits (speed, latitude, ext. heading)
Serial asynchronous form
4800 bps
VBW, VHW, VTG, VSD, GGA, GLL, HDT, THS, HDG, HDM, HRC (Yokogawa inherent)
Ship’s speed (pulse input):
No. of circuits:
Data source:
Pulse rate:
Signal format:
Source voltage:
Source current:

1 circuit
Ship’s speed sensor
200 pulse/nm
Photo-coupler or contact
5VDC
2mA
Buzzer stop (contact):
No. of circuits:
Contact action:
Source voltage:
Source current:

1 circuit
Momentary close to command
5VDC
5mA
Steering mode (contact):
No. of circuits:
Source voltage:
Source current:
Contact action:

1 circuit
5VDC
5mA
Close and hold to continually use the current heading sensor and to inhibit the unusual operation of Master compass during auto-steering mode
Bow/stern reverse (contact):
No. of circuits:
Contact action:
Source voltage:
Source current:

1 circuit
Close and hold to reverse
5VDC
5mA
Output Signal Specification:
Repeater compass signal:
No. of circuits:
Signal Interface:
Transmission convention:
Signaling rate:
Transmission interval:
Formatter

8 circuits
RS422
Serial asynchronous form
9600bps
50ms
HEHDT, HRC, PYDKH (Yokogawa inherent)
Stepper Heading signal:
No. of circuits:
COM:
REF output voltage:
REF output current:
Output form:
Sink current

4 circuits
0V (circuit GND)
24V DC or 35V DC (Option)
0.3A max. or 1A max. (Option)
Open collector (3-bit gray code)
0.4A max. any signal line
Serial signal:
No. of circuits:
Signal Interface:
Transmission convention:
Signaling rate:
Formatter:

3 circuits
RS422
Serial asynchronous form
4800bps or 38400bps
HDT, THS, HDG, HDM, ROT, HRC (Yokogawa inherent)
Analog heading & quadrant signal:
No. of circuits:
COM:
Output voltage:
Output resolution:
Output impedance:
Input impedance of load:
Accuracy:

1 circuit
0V (circuit GND)
0V to 5V DC
2.5mV
2kΩ max.
500kΩ min
±1% (at 25°C)
Analog Rate of Turn (ROT):
COM:
Output:
Signal level:
Output resolution:
Output impedance:
Input impedance of load:

3 circuits
0V (circuit GND)
DC 0…5V
2.5mV
2kΩ max.
500kΩ min
Ship's speed signal selection:1 circuit
Contact signal:
Heading sensor selection
Master compass running
Buzzer stop acknowledge
System failure alarm
Master compass failure alarm
Power failure alarm
Heading deviation alarm
Serial data (Unselect gyro heading)

1 circuit
1 circuit
1 circuit
1 circuit
1 circuit
1 circuit
1 circuit
1 circuit
Dimensions:
MKM026-1
MKR025
MKR026
MKC327
MKR040
MKN018
MKS066

502 × 420 × 420 mm
96 × 96 × 41 mm
96 × 96 × 55 mm
520 × 297 × 200 mm
102 × 96 × 40 mm
190 × 140 × 42 mm
301 × 520 × 200 mm
Weight:
MKM026-1
MKR025
MKR026
MKC327
MKR040
MKN018
MKS066

46 kg
1.4 kg
1.5 kg
16 kg
0.6 kg
0.8 kg
20 kg