Maritime wireless communication is different from terrestrial wireless communication, due to difference of environments. Nevertheless technologies based on WiMAX (IEEE 802.16j) for ship to ship maritime communication promised to deliver high data rates over large distances and deliver multimedia services and are expected to use e-Navigation system. This paper focuses to simulate on IEEE 802.16j...

In the paper the problem of ship trajectory tracking with ε-accuracy is considered. A three-degrees-of-freedom ship model with full dynamic interaction between motions in roll, sway and yaw is assumed. The aim of the paper is to determine the robust control for ship trajectory tracking with ε-accuracy. Such control is obtained by means of a state feedback (called Tytus feedback) system characte...

This paper presents full scale test results and discusses the effectiveness of three different highly skewed propeller designs in reducing ship “ibrati on. The test results cover three merchant ship designs, including one OBO vessel and two RO/RO vessels, having installed horsepower rangj.ng from 24,000 to 37,000 SHP. Limited discussion is presented on the relative effectiveness of installing a...

Marine navigation consists in continuous observation of the situation at sea, determination the anti-collision manoeuvre. So it necessary to determine ship safe trajectory as a sequence of ship course changing manoeuvres. Each manoeuvre is undertaken on the basis of information obtained from the anti-collision system ARPA. This paper describes a method of safe ship control in the collision situ...

This paper describes the procedure developed at MARINTEK for the automatic optimisation of hull lines to reduce the ship resistance as well as the wake wash generated by a ship within the given constraints. The methodology, developed computer programs and used constraints are described. The methodology is exercised using lines of a fast ship. A numerical comparison is performed between the resi...

The Singapore Strait is considered as the bottleneck and chokepoint of the shipping routes connecting the Indian and the Pacific Ocean. Therefore, the ship collision risk assessment is of significant importance for ships passing through the narrow, shallow, and busy waterway. In this paper, three ship collision risk indices are initially proposed to quantitatively assess the ship collision risk...

Accurate ship velocity is important for determining absolute currents from acoustic Doppler current profiler (ADCP) measurements. In this paper, the authors describe the application of two methods to improve the quality of ship velocity estimates. The first uses wide-area differential global positioning system (WADGPS) navigation to improve ship positioning. During the cruise, raw global positi...

The design of ships is an inherently complex process. This complexity is significantly increased when the particular ship being designed is a naval surface combatant. Naval combatant designers, or more appropriately, design teams, must not only address the factors common to all seagoing vessels such as hull form, propulsion, and maneuverability, but additionally must consider the selection, pla...

Operational SDSOI and Novel hierarchical complete approach based on shape and texture properties, which is considered a sequential coarse-to-fine deleting process of fake alarms. Simple shape analysis is adopted to delete evident fake candidates generated by image segmentation with world and local information and to extract ship candidates with missing alarms as low as possible and a novel semi...