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System NautoSteer

Steering Control

The variety of devices required for navigation and monitoring in the bridge area necessitates a functional design which meets sequence-oriented and ergonomic demands. For more than 75 years, Anschütz has been accumulating experience in this field. In 1969, Anschütz introduced modular equipment technology in the area of steering control. Today approx. 10,000 ships use Anschütz steering controls all over the world.

The knowledge gained in this long practice was invested in the systematic development of these devices which make up the NautoSteer product range today.

All requirements for individual fitting of modern ships - from the smallest to the largest - can be economically met by Raytheon Marine NautoSteer.

NautoSteer stands for:

  • Safety, reliability, redundancy
  • Integral component of the Integrated Navigation and Bridge System, expandable
  • Proper design of cooperating functional groups
  • Versatile installation possibilities
  • Increased reliability by self-explanatory designation of important sequences
  • Reliable legibility of instruments
  • Night design with individual or central dimming
  • Neutral and non-reflective colors
  • Service-friendly design
  • In compliance with all national and international classification rules, especially the IMO resolution A.325 IX and the SOLAS resolution MSC.1 (XLV), chapter II, part C, no. 29

Basic Systems
Dual Follow-up (Dual FU)The required rudder angle is selected on the mechanical rudder position indicator at the follow-up handwheel or tiller. The servo mechanism of the steering gear is operated by one amplifier (1 amplifier per pump or valve according to IMO or SOLAS) and the rudder is moved until it reaches the required angle. The actual rudder position is transmitted by the feedback unit.

Dual Non-Follow-up (Dual NFU) To command a rudder, electrical movement contacts are made by moving the NFU tiller. The rudder position is changed as long as the contact is held. The steering gear is controlled according to IMO or SOLAS (1 contact set per pump or valve). During the steering process, the actual rudder angle should be checked on the rudder position indicator.

FU/Dual NFU Depending on the type of steering selector at the steering mode selector switch, the steering gear is controlled by the follow-up or the non-follow-up control system. Each of the two steering systems is able to control both pumps of the steering gear. Due to the redundant (dual) design of the non-follow-up controls, this system is the main steering control in this configuration according to IMO or SOLAS.

System Structure

Pilotstar D - A new digital autopilot concept

Control Components

Follow-up controls
Contact steering by follow-up amplifier
Follow-up tiller     
Feedback unit

Follow-up amplifier 

   
Actuator
Solenoid valve with on/off function

Non-Follow-up controls
Direct contact steering elements

Not shown
  • NFU tiller
  • NFU vertical tiller
NFU push button unit

Actuator
Proportional valve or torque motors

Feedback unit

Selection of remote steering stands
In principle, all basic steering control systems (dual FU, dual NFU, dual FU/NFU) can be extended by remote steering stands.

The steering stands, e.g. bridge wings, are selected by a steering mode selector switch and by the electronic "Take-over system"

The steering mode selector switch has an additional position "REMOTE" by which all remote steering stands can be activated.

Rudder Position Indicator
The scope of supply of the Raytheon Marine steering control system includes the feedback unit, which is usually installed on the rudder stock. In addition to the limit switches, this feedback unit includes various potentiometers. One of these potentiometers is intended as transmitter for the actual electrical rudder position indicators.

Hence, no additional feedback unit and no additional mechanical connection is required at the rudder stock.

Universal Signal Device
Up to 15 alarm and status indications of the steering gear system can be free configured on the NAUTOALARM. On request, the steering mode selector switch can be supplied with illuminated status information on steering control modes.

Override Control
FU and NFU tillers can be extended by an override function if desired by the customer. "Override" means an immediate disconnection of the automatic mode, such as autopilot or track control and the activation of manual control.

The override signal unit indicates this mode visually and audibly. It enables a return to the automatic mode on completion of the manual steering maneuver via a push-button switch.

Monitoring system
The steering failure alarm device offers online monitoring from the rudder order element of the FU steering control to the rudder blade as well as synchronization monitoring of mechanically independent double steering gears.

Emergency controls
Some classification societies require a dual emergency control in the steering gear room. A separate change-over switch "bridge/steering gear" in the steering gear room as well as a dual FU tiller meet this task in connection with a steering repeater compass.

The change-over switch can be locked against unauthorized use. It electrically isolates the steering control in the steering gear room from all other steering controls on the bridge. This ensures galvanically separated operation.

If the mechanical rudder position indicator cannot be seen on the stock, the system can be extended by the Raytheon Marine electric rudder position indicator.

 

Installation frames for complete systems
An economical solution for out fitting bridge desks is to combine individual systems in mounting frames. These standardized, fully furnished frames belong to the steering stand program.

If required, a 2.5 m cable trunk can be provided to connect with the console connecting terminals.

Brochure ... 3.0 mb
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