Tokyo Keiki PR-2000 Series heading control system is designed for operational simplicity, utilizing a human-engineered panel layout that ensures clear visibility and effortless control for bridge officers. Engineered to deliver a more affordable steering solution with improved course-holding ability, it combines advanced PID control algorithms with dual-gain weather adjustments. This intelligent control minimizes unnecessary rudder movement—often referred to as rudder “hunting”—which directly lowers fuel consumption and reduces mechanical wear on the vessel’s steering gear.

Key System Highlights

Flexible Configurations:
- Stand-Alone Model: A space-saving, narrow steering pedestal for vessels utilizing external heading sensors.
- GYLOT® Model: An all-in-one steering stand that integrates the master gyrocompass sphere directly inside the autopilot housing.
- Console Model: A modular flush-mount panel version tailored for integrated bridge consoles.
Broad Compatibility: Works seamlessly with a variety of steering systems, including standard solenoid valves, proportional valve drives ( $\pm 10\text{V}$ / $4\text{--}20\text{mA}$ ), and torque motor interfaces (Kawasaki, Mitsubishi, JMU).
High Operational Efficiency: Maintains tight, dependable course holding across varied sea states without requiring complex manual fine-tuning.
“GYLOT” is a registered trademark of TOKYO KEIKI.

Technical Specification

1. Electrical & Power Specifications

Parameter	Specification
Main Power Supply	AC 100V / 110V / 115V / 220V $\pm 10\%$ , 1-phase, 50/60 Hz
Backup Power Supply	DC 24V (+30%, -10%) (Automatic switchover on AC failure)
Power Consumption	Approx. 80 VA to 150 VA (varies by configuration)
Enclosure Protection	IP22 (Steering Stand / Console Unit)

2. Sensor Inputs & Interfaces

Interface	Signal Type / Format
Gyrocompass Input	Serial Step, Synchro (1/6° or 1/90°), or Tokyo Keiki Digital Serial (`TG-5000`, `TG-6000`, `TG-8000`, `ES-110`)
Magnetic / GPS Input	NMEA 0183 (`$HEHDT`, `$HCHDT`, `$INHDT`) via RS-422
Speed Input	NMEA 0183 (`$VHW`, `$VTG`) or Pulse Log (200 pulses/NM)
Rudder Feedback	Potentiometer / Synchro Unit (`FB-3` or `FBU` series)

3. Steering Gear Control Outputs

System Code	Interface Type	Control Output
PR-2000-E / ED	Solenoid Valve Drive	DC 24V / AC 110V–220V relay contacts
PR-2000-DT	Proportional Valve Drive	$\pm 10\text{V DC}$ or $4\text{--}20\text{mA}$ current signal
PR-2000-DW	Kawasaki Torque Motor	Direct torque motor control board interface
PR-2000-DM	Mitsubishi / JMU Torque Motor	Direct torque motor control drive

4. Control Modes & Performance Features

Steering Control Modes:
- AUTO (Automatic PID Heading Control)
- HAND (Follow-Up Helm Wheel Steering)
- NFU (Non-Follow Up / Tiller Control)
- REMOTE (Bridge Wing / Remote Tiller)
Control Algorithm: Advanced PID algorithm with dual-gain weather adjust (minimizes rudder “hunting”).
Heading Accuracy: Holds heading within $\pm 0.5^\circ$ to $\pm 1.0^\circ$ depending on sea state.
Safety Alarms: Off-course alarm, Gyro/Sensor failure alarm, Steering gear failure, Power supply failure alarm.

5. Physical Configurations & Models

Stand-Alone Model: Narrow-type steering stand for connection to separate external gyrocompasses.
GYLOT® Model: Integrated steering pedestal housing the internal master gyrocompass sphere.
Console Model: Modular flush-mount panel designed for integrated bridge consoles.