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:1°
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 CMZ700

  • Excellent Anti-vibration structure
  • Improvement of reliability by Gimbal-less mechanism in container
  • Improvement of follow-up function
  • Low power consumption realized ship's battery drive. If AC adapter is connected, AC mains back-up the system. (AC adapter: Option)
  • Back-up by external heading signal (Magnetic compass, GPS compass etc.). Repeater heading is automatically synchronized from Gyro heading to external heading.
  • Auto speed-error correction function (Option)
  • Repeater compass signal is transmitted by digital signal
  • Built-in the restart timer (from 1 to 99 hours)
  • The operation unit, which can be also built-in console, consisting of various indication, and operation function, is applicable to both single and dual gyro system specification.
  • Simple configuration of dual gyro compass system. Only two(2) master compasses, one(1) control box and AC adapter contribute of saving space of dual gyro compass system.
  • Master compass and control box of CMZ700S can be installed in autopilot stand.
  • Easy change-over function of external heading
Set of supply:
  • Master compass MKM022 (2 x master compasses for CMZ700D)
  • Control box MKC320 (for CMZ700S) or MKC321 (for CMZ700D)
  • AC adapter MKR027
  • Dual AC adapter MKS066 (for CMZ700D)
Options:
  • Power supply for stepper DC35V
  • Steering Repeater Compass MKR051
  • Repeater compass MKR050
  • Rate Of Turn indicator MKR303 or MKR302 (with dimmer)
  • Tilting Bracket KX703
  • Horizontal Bracket KX201A
  • Horizontal Stand KX704
  • Connection Box MKN015
  • Dual Channel Recorder KR180A
  • Operation Unit MKR024
  • AC Adapter MKR027
  • Switch Unit MKR026

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
Permissible shock:0.5G / 0.5 sec
Ambient operating temperature:-10 to +55°C
Power Supply for CMZ700B:24V DC
Power Supply for CMZ700S and CMZ700D (for CMZ700B with AC adapter):
Main power:100V/110V/115V/220V±10% AC 50/60Hz±5%
Backup power:DC24V Ship's Battery
Power consumption (cold start):
Master compass:3.17A (76.1W)
Repeater compass:0.35A (8.4W) ± number of Repeaters
Stepper:
CMZ700B
CMZ700S / CMZ700D
0.3A (7.2W)
1.0A (24W)
Power consumption (hot start):
Master compass:1.83A (43.9W)
Repeater compass:0.35A (8.4W) ± number of Repeaters
Stepper:
CMZ700B
CMZ700S / CMZ700D
0.3A (7.2W)
1.0A (24W)
Input Signal Specification:
External Heading Signal:
Input:
Receiver:
Signal Interface:
Sentence:
1 circuit
Photo coupler
RS422 (RS422A or RS485)
HDM, HDG, VTG, VHW (IEC61162-1)
Latitude signal (CMZ700S / CMZ700D):
Input:
Receiver:
Signal Interface:
Sentence:
1 circuit
Photo coupler
RS422 (RS422A or RS485)
GGA, GLL (IEC61162-1)
Ship's speed signal (CMZ700S / CMZ700D):
Serial signal:
Pulse signal:
Signal Interface:
Sentence:
1 circuit
200 p/nm
RS422 (RS422A or RS485)
VBW, VHW, VTG (IEC61162-1)
Buzzer stop contact signal:1 circuit
Output signal (CMZ700B / CMZ700S and CMZ700D):
Repeater compass signal:
Output:
Signal Interface:
Sentence:
3 / 8 circuits
RS485
HDT (IEC61162-1);
YDK (YDK original format + For zero adjustment)
Stepper Heading signal:
Output:
Signal output:
Output capacity:
1 / 4 circuits
DC24V 1/6° 3bit gray code, DC35V (Option)
Max. 0.3 / 1.0A
Serial signal:
Output:
Signal Interface:
Sentence:
3 circuits
RS485
HDT, ROT, CMZ300X (YDK private format)
Analog signal (option for CMZ700B):
Heading:
Signal level:
1 circuit
DC 0…5V
Rate-of-turn signal:
Output:
Signal level:
Output range:
Max. 3 circuits
DC 0…5V
Selectable among ±30, ±100, ±300 °/min
Ship's speed signal selection:1 circuit
Contact signal:
Gyro system fail
Gyro operation
Gyro No-Volt alarm
System fail (for CMZ700S/D)
Heading deviation (for CMZ700S/D)
Gyro external selective output
1 circuit
1 circuit
1 circuit
1 circuit
1 circuit
1 circuit
Output power supply:3 circuits
Dimensions:
MKM022
MKC320/321
MKS066
350 × 460 × 360 mm
227 × 420 × 200 mm
225 × 426 × 200 mm