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In Table 7, we can see that every number is smaller than 1, so when we calculate the weight, we can skip Step 1 in Section 5.1, with Steps 2–4 in Section 5.1 we calculate the information entropy E, the results are shown in Table 8 (we only put T value to calculate).

Table 8

E-value of ship

First-grade	Weight	Second-grade	Weight	Third-grade	Weight
Human factors	0.2844	Responsibility of crew	0.6481
		Business skills and experience of crew	0.2809
		Physical condition of crew	0.0710
Ship factors	0.3895	Age of vessel	0.2758
		Tonnage	0.2313
		Maintenance status	0.4642
		Technical state of ship	0.0287
Environmental factors	0.0095	The natural environment	0.2861	Wind rating	0.3970
				Wave height	0.3970
				The velocity	0.0903
				The visibility	0.1157
		The port environment	0.7139	Channel condition	0.4224
				Navigation AIDS	0.4224
				Navigable density	0.1552
Management factors	0.3165	Staffing and training	0.3623
		Shipping company safety management system	0.0080
		Management supervision and inspection	0.6297

First-grade	Weight	Second-grade	Weight	Third-grade	Weight
Human factors	0.2844	Responsibility of crew	0.6481
		Business skills and experience of crew	0.2809
		Physical condition of crew	0.0710
Ship factors	0.3895	Age of vessel	0.2758
		Tonnage	0.2313
		Maintenance status	0.4642
		Technical state of ship	0.0287
Environmental factors	0.0095	The natural environment	0.2861	Wind rating	0.3970
				Wave height	0.3970
				The velocity	0.0903
				The visibility	0.1157
		The port environment	0.7139	Channel condition	0.4224
				Navigation AIDS	0.4224
				Navigable density	0.1552
Management factors	0.3165	Staffing and training	0.3623
		Shipping company safety management system	0.0080
		Management supervision and inspection	0.6297

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