CONTROLLED RADIAL STEERING A NEW, SIMPLE METHOD FOR PRECISE STEERING OF A SHIP THROUGH TURNS

A new method of steering a ship has been tested on board M/S BORE 1, a seagoing passenger ferry operating between Sweden and Finland. The method is called Controlled Radial Steering and has been developed by the Swedish National Defense Research Institute. The Controlled Radial Steering System reduces the uncertainty factor when a ship turns, and has been specially designed for improving navigation in coastal archipelagoes and narrow fairways. The new system enables the operator to choose the exact points of transition between the turn and the straight course. The system causes the ship to follow a closely defined arc, the radius of which is selected on the basis of an ordinary sea chart; this radius is not dependent on ship's speed. The basic system can be extended by the use of radar information, enabling precise changes of the original track to be made. Such changes may be necessary for e.g. collision avoidance. The new system causes the ship to perform one smooth turn instead of a series of sharp turns; a smooth turn is safe and economical, since the small rudder angles required result in little loss of speed. A complete system for Controlled Radial Steering, CRS, includes three units: a path selector unit, a turning radius indicator, and a special autopilot.

• Supplemental Notes:
  • Proceedings of the 2nd International Ship Operation Automation Symposium, Washington, D.C., August 30 - Sept 2, 1976. Proceedings expected to be available about Dec. 1976.
• Corporate Authors:

  North-Holland Publishing Company

  52 Vanderbilt Avenue
  New York, NY  United States  10017
• Authors:
  • Hagelstam, L
  • Larjo, K
  • Sten, L
• Conference:
  • Proceedings of the 2nd International Ship Operation Automation Symposium, Washington, D.C., August 30 - Sept 2, 1976. Proceedings expected to be available about Dec. 1976.
• Publication Date: 1976

Media Info

• Pagination: p. 53-59
• Serial:
  • Volume: 5

Subject/Index Terms

• TRT Terms: Automatic pilot (Aircraft); Automatic pilot (Ships); Maneuvering; Steering systems; Turning traffic
• Old TRIS Terms: Turning characteristics
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00139771
• Record Type: Publication
• Source Agency: North-Holland Publishing Company
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Oct 6 1976 12:00AM