Furuno Doppler speed log DS-80
FURUNO Electric Co., Ltd.
Refurbished
The FURUNO DS-80 Doppler Speed Log is a marine Speed and Distance Measuring Equipment (SDME) designed to measure a vessel's speed through water (STW) using the Doppler principle.
The DS-80 determines vessel speed by transmitting ultrasonic signals into the water and detecting the Doppler frequency shift of echoes returned from the water mass. FURUNO's documentation describes a paired-beam Doppler system, which helps reduce errors caused by vessel pitching. Speed information can also be supplied to connected navigation equipment through an IEC 61162-1 interface.
The supplied SM MARINE SERVICE™ photograph shows a multi-unit DS-80 system including the DS-800 Doppler Speed Log display and large associated system cabinets, making it particularly useful for vessels seeking complete-system or individual-component replacements.
Manufacturer: FURUNO Electric Co., Ltd.
Country of Origin: Japan
Model: DS-80
Product Type: Doppler Speed Log / Speed and Distance Measuring Equipment
Measurement: Speed Through Water (STW)
Measurement Principle: Paired-beam Doppler method
Marine Application: Vessel speed and distance measurement for bridge-navigation systems
Successor Model: FURUNO DS-85
FURUNO's current DS-85 documentation specifically identifies the DS-80 as the previous model and confirms that existing DS-80 tank or valve arrangements can be reused in certain DS-85 retrofit installations.
The DS-80 measures ship speed by detecting the Doppler shift in ultrasonic echoes returned from a layer of water beneath the vessel.
Unlike speed-over-ground information from GNSS, a Doppler speed log provides speed through the surrounding water, which is valuable to navigation, maneuvering and integrated bridge systems.
FURUNO states that DS-80 speed information can interface with other shipborne equipment including ARPA and AIS using IEC 61162-1-format output.
• Doppler measurement of speed through water
• Paired-beam transducer system
• Reduced pitching-related measurement error
• Speed and distance presentation
• Simple normal operation
• Digital navigation-data output
• IEC 61162-1 interface
• Connection to ARPA, AIS and other bridge equipment
• Remote speed/distance indicators available in system configurations
• Suitable for commercial merchant vessels
• Complete modular system architecture for easier component replacement
The DS-80's paired acoustic beams are arranged symmetrically, helping compensate for vessel pitching effects during measurement.
FURUNO documentation identifies the following primary DS-80 equipment:
DS-800 – Display Unit
Provides ship speed, distance and operating information.
DS-801 – Distribution Box
Distributes power/signals among the main DS-80 equipment and connected interfaces.
DS-810 – Transceiver Unit
Handles ultrasonic signal transmission, reception and signal processing.
DS-820 – Transducer Unit
Hull-mounted acoustic sensor used for Doppler speed measurement.
Other documented or optional equipment can include:
• DS-802 Terminal Box
• Remote speed indicator
• Remote distance indicator
• Junction box
• Analogue display equipment
• Gate valve / transducer tank arrangement
• Associated cabling and interface components.
These exact model numbers are very useful when searching for FURUNO DS-80 spare parts rather than replacing the complete installation.
The DS-80 transducer sends ultrasonic energy into the water beneath the ship.
Particles and microorganisms in the water mass reflect part of the signal back toward the transducer. When the vessel moves, the frequency of the returned signal changes relative to the transmitted frequency.
The DS-80 calculates vessel speed from this Doppler frequency shift. The manual notes that measurement normally uses echoes from a water layer approximately several metres below the ship, although environmental conditions can influence echo quality.
The DS-80 can provide speed information to other bridge-navigation equipment.
Typical connected systems may include:
• Radar / ARPA
• AIS
• ECDIS
• VDR / S-VDR
• Autopilot
• Integrated Bridge Systems
• Remote speed indicators
• Distance indicators
The DS-80 manual specifically confirms IEC 61162-1 output to ARPA, AIS and other shipborne equipment.
The performance of a Doppler speed log depends heavily on correct transducer installation.
The DS-80 installation manual states that its transducer should be installed in an appropriate underwater location and recommends maintaining at least 2.5 metres separation from an echo-sounder transducer to help avoid interference.
Installation or replacement of the hull fitting, transducer tank or gate valve should therefore follow the applicable FURUNO drawings and shipyard procedures.
The FURUNO DS-80 has been widely used aboard:
• Cargo Ships
• Container Ships
• Bulk Carriers
• Oil Tankers
• Chemical Tankers
• LNG/LPG Carriers
• Passenger Vessels
• Offshore Vessels
• Merchant Ships
• Other commercial vessels requiring SDME information
Its speed-through-water data can contribute to navigation, maneuvering and connected bridge-system calculations.
Check the DS-820 transducer, transducer cable, DS-810 transceiver and associated connections.
A display showing no speed does not automatically mean the DS-800 display is faulty.
Possible causes include:
• Air bubbles or aerated water around the transducer
• Transducer contamination
• Poor signal conditions
• Cable/connector faults
• Incorrect setup
• Transceiver problems
The Doppler measurement relies on suitable returned acoustic echoes from the water mass, so environmental conditions can sometimes influence signal availability.
Inspect incoming power, DS-801 distribution arrangements, wiring, connectors and display electronics.
Check speed-offset settings and compare the indication with known vessel operating conditions. Also inspect the transducer and signal-processing sections before calibration or adjustment.
Inspect IEC 61162-1 interface wiring, output configuration and the receiving equipment's input settings.
The DS-810 Transceiver Unit contains key transmitting and receiving circuitry. A failure in this unit may result in missing or abnormal speed information.
DS-80 technical documentation identifies a transducer-temperature indication/status in the system diagnostics. Such faults should be investigated at the transducer, cabling and transceiver interfaces rather than automatically replacing the display.
• Inspect DS-800 display operation regularly.
• Check DS-801 distribution-box connections.
• Inspect DS-810 transceiver cabling and terminals.
• Check underwater transducer condition during docking.
• Inspect the transducer tank and gate valve where fitted.
• Keep electrical cabinets clean and dry.
• Check navigation-data outputs periodically.
• Verify displayed speed against other available information.
• Investigate unstable readings promptly.
• Use correct FURUNO replacement components when repairing the system.
Transducer installation and servicing are especially important because FURUNO states that system performance is directly dependent on correct transducer installation.
SM MARINE SERVICE™ can support sourcing of FURUNO DS-80 complete systems and individual spare parts, depending on stock availability.
Common requirements include:
• Complete FURUNO DS-80 Doppler Speed Log
• DS-800 Display Unit
• DS-801 Distribution Box
• DS-810 Transceiver Unit
• DS-820 Transducer Unit
• DS-802 Terminal Box
• Remote Speed Indicator
• Remote Distance Indicator
• PCBs / Electronic Boards
• Display / LCD Components
• Power Supply Components
• Transducer Cable
• Signal Cables
• Connectors
• Junction Boxes
• Gate Valve Components
• Transducer Tank Components
• Internal Electronic Parts
Available equipment can include:
New • Used • Tested Working • Refurbished • Reconditioned
The current FURUNO successor in this product class is the DS-85 Doppler Speed Log.
FURUNO explicitly describes the DS-80 as the previous model and notes an important retrofit advantage: the existing DS-80 tank or valve can be reused when replacing the DS-80 with a DS-85, depending on installation.
This can reduce structural modification and retrofit cost.
Therefore, customers with an older DS-80 generally have two practical options:
Option 1: Repair or replace individual DS-80 components such as the DS-800, DS-801, DS-810 or DS-820.
Option 2: Consider upgrading to the newer FURUNO DS-85 where complete-system replacement is required.
Many vessels already have the DS-80 transducer tank, gate valve, cabling, distribution equipment and bridge interfaces permanently installed.
If only one component fails, replacing a DS-800 Display Unit, DS-801 Distribution Box or DS-810 Transceiver Unit can often be significantly simpler than changing the complete speed-log installation.
The availability of compatible legacy spare parts is therefore particularly valuable for vessels trying to maintain existing DS-80 systems until a planned retrofit.
The FURUNO DS-80 is a Doppler Speed Log designed to measure a vessel's speed through water and distance travelled using ultrasonic Doppler measurement.
The DS-800 is the Display Unit used in the FURUNO DS-80 system.
The DS-801 is the Distribution Box used in the DS-80 installation.
The DS-810 is the Transceiver Unit of the FURUNO DS-80 Doppler Speed Log.
The DS-820 is the Transducer Unit associated with the DS-80 system.
Its primary function is speed through water (STW) using Doppler acoustic measurement.
Yes. FURUNO documentation specifies IEC 61162-1 output for interfacing with ARPA, AIS and other shipborne equipment.
SM MARINE SERVICE™ can support sourcing of complete DS-80 systems and individual replacement components subject to stock availability.
Yes. Used, tested, refurbished and reconditioned DS-80 equipment can be supplied depending on availability.
The FURUNO DS-85 is the newer replacement model. FURUNO confirms that existing DS-80 tank or valve equipment can be reused for certain DS-85 retrofits.
FURUNO DS-80 Doppler Speed Log is a professional marine Speed and Distance Measuring Equipment system for measuring vessel speed through water using the paired-beam Doppler principle. Major components include the DS-800 Display Unit, DS-801 Distribution Box, DS-810 Transceiver Unit and DS-820 Transducer Unit. SM MARINE SERVICE™ can support worldwide supply of complete DS-80 systems and spare parts in used, tested, refurbished and reconditioned condition.
FURUNO's archived DS-80 documentation covers the Doppler measuring principle, system configuration, specifications and installation arrangements.
The DS-80 operator documentation covers operation, Doppler measurement principle, maintenance, troubleshooting and IEC 61162-1 interfacing.
View FURUNO DS-80 Operator's Manual
FURUNO's current DS-85 product page includes replacement/retrofit information for the DS-80.
FURUNO DS-85 Official Product Information
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Stock Location:
• Bangladesh • China
Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
Contact Information
SM MARINE SERVICE™ Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
0
BDT 0
BDT 0
BDT 0
BDT 0
Marine Equipment Supplier