SAL R1a Speed Log: Precision Speed Measurement for Safe Navigation
The SAL R1a Speed Log, developed by Consilium Marine & Safety, is a highly reliable Doppler-based speed log system designed for professional maritime applications. It provides precise measurements of vessel speed through water (STW) and optionally speed over ground (SOG), essential for safe navigation, maneuvering, and compliance with international maritime regulations.
Known for its accuracy, robustness, and ease of use, the SAL R1a is widely used in commercial vessels, including cargo ships, tankers, and passenger vessels. It employs Doppler sonar technology to measure the ship’s longitudinal speed and can be interfaced with other onboard systems such as ECDIS, radar, and autopilot for integrated navigation solutions.
Key Features:
Doppler Technology: Provides accurate speed through water using acoustic Doppler measurement.
Compliant with IMO Standards: Meets performance standards of IMO, IEC, and ITU for speed log systems.
Single/Dual Axis Models: Available configurations allow measurement of longitudinal and transverse speed.
Flexible Display Options: User-friendly display unit with clear digital and analog readouts.
Rugged Design: Built for long-term use in harsh maritime environments.
Easy Integration: Interfaces with bridge systems via standard NMEA protocols.
Technical Specifications:
Speed Range: 0 to 40 knots
Accuracy: ±0.2 knots or ±2% of reading (whichever is greater)
Measuring Principle: Doppler sonar, single or dual beam
Display Unit: Digital with analog indication, dimmable backlight
Interfaces: NMEA 0183, analog, relay outputs
Power Supply: 24 V DC or 115/230 V AC
Operating Temperature: -15°C to +55°C
Installation: Hull-mounted transducer
FAQs – SAL R1a Speed Log
What does the SAL R1a measure?
It measures a ship’s speed through water (STW) and optionally speed over ground (SOG).
What technology does it use?
Doppler sonar technology to ensure precise velocity measurement.
Is the system IMO compliant?
Yes, it meets IMO and IEC standards for speed and distance measuring equipment.
Can it be integrated with ECDIS and autopilot?
Yes, it outputs data via NMEA 0183 for full integration.
What is the speed measurement range?
It can measure speeds from 0 to 40 knots.
What is the typical accuracy?
±0.2 knots or 2% of reading, whichever is greater.
Does it measure both longitudinal and transverse speed?
Dual-axis models are available for both directions.
What kind of display is provided?
A digital display with analog-style readout and dimmable lighting.
Is it difficult to install?
No, it features hull-mounted installation with clear setup procedures.
Which types of vessels use the SAL R1a?
It is used on commercial vessels, ferries, offshore support ships, and other IMO-class vessels.
