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38 Y.A. SOYADI, Y.A. SOYADI, Y.A. SOYADI ve Y.A. SOYADI

Table 1. Risk Index

RISK INDEX (RI)

SEVERITY (SI)

FI FREQUENCY 1 2 34

Minor Significant Severe Catastrophic

1 Extremely remote to 2 3 45
extremely improbable

2 Remote to extremely 3 4 56
remote

3 Remote 45 67

4 Reasonably probable to 5 6 78
remote

5 Reasonably probable 6 7 89

6 Reasonably probable to 7 8 9 10
frequent

7 Frequent 89 10 11

Table 1 gives a risk level related to the frequency and severity of an accident. RRN ranges from
2 (least frequent and least severe consequence) to 11 (most frequent and most severe
consequence).

5. An Example
Estimated characteristics of a generic fishing vessel are as follows:

• Vessel life expectancy: 20 years

• Operational days per year: 200

• Operational hours per day: 12

• Major maintenance per year: 1

Risk matrix table according to IMO:

GiDB|DERGi Sayı 1, 2015