By Adam Weintrit
The TransNav 2013 Symposium held on the Gdynia Maritime collage, Poland in June 2013 has introduced jointly a variety of individuals from around the globe. this system has offered a number of contributions, permitting to appear at many features of the navigational protection from a number of varied issues of view. themes provided and mentioned on the Symposium have been: navigation, security at sea, sea transportation, schooling of navigators and simulator-based education, sea site visitors engineering, ship's manoeuvrability, built-in platforms, digital charts structures, satellite tv for pc, radio-navigation and anti-collision platforms and plenty of others. This publication is a part of a sequence of four volumes and offers an outline of advances in Marine Navigation and is addressed to scientists and execs all for learn and improvement of navigation, protection of navigation and sea transportation.
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Extra resources for Advances in marine navigation
Development of Collision Avoidance System by using Expert System and Search Algorithm”, International Shipbuilding Progress, v. , 2001.  Hasegawa, K. and Kouzuki, A. 1-10, 1987. N. F. , 2009.  ECDIS Ltd. p=334. I. , 1994.  Száapczynski, R. “Evolutionary Sets of Cooperating Trajectories in Multi-Ship Encounter Situations - Use Cases”, International Journal on Marine Navigation and Safety of Sea Transportation, v. , 2010. And dectection range should be adjusted to smaller value in case of coastal waters.
2 Decision support Algorithm for this system was based on the collision avoidance algorithm of Seoul National University  and partially modified in order to be suitable for ECDIS system. Basic algorithm and modifications according to improvement requirements are explained briefly as below. Figure 5. Membership function of DCPA Minimum operator is used as in the conditional part of ith rule. Parameters of conditional part have membership function of triangular type as shown in Figure 4 and Figure 5.
When collision risk exceeds the predetermined threshold, this system produces the recommended paths through the expert system based on CLIPS. This module determines each target as either privileged or burdened and recommends the safest actions according to the action plan. Figure 6 shows the course alteration diagram suggested by the Royal Institute of Navigation in 1970 . Figure 6. Course Alteration Diagram Figure 8. Modified Membership Function of TCPA 0 Before Modification After Modification -4000 -8000 -12000 Figure 7.
Advances in marine navigation by Adam Weintrit