... vessels. Station keeping uptime was approximately 25% and this was considered as significant improvement compared to known alternatives at the time. Since the early years of Dynamic Positioning, the total fleet of DP capable vessels has now grown to approximately 5000 vessels. In average, a new DP Control...

... and ship building industries all over the world. The paper describes the major challenges of dynamic positioned vessels in ice-covered waters. As the forces acting on vessels in ice and also their response are substantial different from the behavior in open waters, new philosophies and strategies have...

... USING ELECTRONIC CHART DISPLAY AND INFORMATION SYSTEMS (ECDIS) WITH DYNAMIC POSITIONING (DP) DP BACKGROUND Specialised requirements of the offshore oil industry has been a prime catalyst in the development of new technologies and control systems for vessels. Dynamic Positioning (DP) systems...

... was installed on the "Seaway Sandpiper", a 20,000 dwt. bulkship converted to a dynamically positioned stonedumper. In 1981, M/T Wilnora was the first tanker to be converted for dynamically positioned loading at the Articulated Loading Platform (ALP) on the Statfjord field. The many advantages of this concept...

... ABSTRACT As recently as 10 years ago, deep water for drilling rigs was 600 feet and beyond. Really deep water, 1000'+, was on the horizon but reserved for dynamically positioned ships. Only 2-3 years ago some experts still proclaimed that moored operations beyond 2000' were not possible...

... ABSTRACT This paper describes the development of a cost-effective floating production system, comprising a conventional tanker fitted with a dynamic positioning (DP) system to maintain the riser connection to the well head. Reduced costs in the DP system are achieved by using a control...

...., offloading or permanent mooring. Particular attention is paid to the system's redundancy and reliability. INTRODUCTION In 1981, a purpose built dynamic positioning system for an offshore loading tanker in a single point mooring situation was developed by KONGSBERG ALBATROSS. This type of systems has been...

... ABSTRACT A method is described which may improve the dynamic positioning of large ships in wind and waves, especially in case of non-parallel wind and wave directions. The proposed method applies the measurement of relative motions at two opposite side locations to estimate the wave direction...

... ABSTRACT In this paper, an unconventional dynamic positioning (DP) system is introduced which is relatively simple from the point of view of the thruster layout and, by virtue of the same thruster layout, automatically positions the vessel in a favorable heading relative to the environment...

... ABSTRACT This paper deals with the concept of and a system for complete control of the slowly varying bow motion of a bow-moored ship using dynamic positioning. System performance is shown by simulated case studies with an offshore 1oading tanker. Significant improvements of motion behaviour...

... ABSTRACT Existing dynamic positioning systems for ships depend mainly on a feed-back control using the position error as input, supplemented by a feed-forward control signal-based on the instantaneous wind speed and direction. This paper explores the possibility of creating a feed-forward...

... and calibration. Among such activities are tracking of submarines, divers, underwater towed pipes and structures, and as a position reference for dynamic positioned ships and semisubmersibles. The paper deals with field experiences from operations mentioned above using a hydroacoustic navigation system based...

... drilling platform into an efficiently designed, dynamically positioned mobile drilling vessel. Operational range and capability have been extended dramatically over the past decade. Similarly, the volume of engineering and operational experience necessary to produce these achievements has grown...

... ABSTRACT The digital cqntro1 system used for dynamic positioning (DP) of a floating drill rig can also be used for management or monitoring of the shipboard power-generation system. This is a natural extension of the DP digital computer, in that the automatically controlled propulsion units...

... Abstract This paper deals with the development of the dynamic positioning equipment for the drillship which is now under construction at a yard of I.H.C. Holland and which is expected to enter world-wide service by December 1971. The paper describes the philosophy of the design, the main...

... Abstract The paper describes the main dynamic positioning system used on the "Terebel" and the alternate equipments, concepts and hardware tried - The results of five years of operations are stated and discussed. They cover the efficiency of the various systems, their freedom from trouble...