Assessment of Ship-Overtaking Situation Based on Swarm Intelligence Improved KDE

Table 2

Haicang channel elements.

Point	Latitude	Longitude	Turn angle	Range/m	Course
E′	24°25′46.73″N	118°03′25.03″E	0°0′	3162	286^o38′08″-106^o38′08″
E1	24°26′15.83″N	118°01′37.36″E	15°27′	3097	282°59′59″-102°59′59″
E2	24°26′38.13″N	117°59′50.14″E	0°0′	2267	282°59′59″-102°59′59″
E3	24°26′56.10″N	117°58′23.63″E	6°11′	947	289°10′31″∼109°10′31″
E4	24°27′03.64″N	117°57′59.63″E	0°0′	922	289°10′31″∼109°10′31″
E5	24°27′13.37″N	117°57′28.67″E	0°0′	721	289°10′31″∼109°10′31″
E6	24°27′20.98″N	117°57′04.45″E	0°0′	200	289°10′31″∼109°10′31″
E7	24°27′23.10″N	117°56′57.72″E	0°0′	373	289°10′31″∼109°10′31″