The Effect of High Ship Speed Ratio on Collision Avoidance Behavior of COLREGS

Abstract

The speed ratio is an important factor that must be considered when two vessels will course change to avoid collision. In the process of the research on Personifying Intelligent Decision-making for Vessel Collision Avoidance (short for PIDVCA), it is found that the effect of collision avoidance based on the existing "International Regulations for Prevention Collision at sea" (short for COLREGS) is greatly affected by the high speed ratio (k=Vt/V0≥1.5). Through the analysis on the geometric change law of two vessels' relative motion in Open waters, the effects of the responsibility for the ship collision avoidance under the COLREGS and special case for high-speed ratio is discussed. According to the collision avoidance measures taken for two vessels encounter situation, some reasonable suggestions are put forward and the simulation experiments that based on shipʹs intelligent collision avoidance simulation platform are given to support the idea.

Application of Intelligent Obstacle Avoidance Algorithm Combined with Internet of Things Technology in Navigation

“…BP neural network is used to predict the position coordinates S of the ship after T minutes. Finally, the collision risk value  and risk degree of the ship at S are calculated, as shown in formula (12). sin 360…”

“…The simulation experiment was carried out based on the ship intelligent collision avoidance simulation platform. According to the collision avoidance measures taken by the two ships, reasonable suggestions were put forward [12].…”