Abstract
Securing a ship’s safe stability is essential. Thus, monitoring the stability parameters of the IMO requirements is required to provide an alert about the risk of the safety of ships’ stability to the captain, officers, and the crew of a ship. However, calculating all ships’ intact stability parameters is complex without ship loading software or equipment. To evaluate ships’ intact stability parameters, a convenient methodology to simply calculate them is necessary as a supplementary method for ships in the absence of loading software or equipment. In the present study, the Simple Evaluation Methodology for Intact Stability (SEMIS) is proposed. SEMIS is introduced for simply evaluating the safety of ships’ stability according to GM. Based on the stability parameters of 336 loading conditions of 19 model ships, empirical formulas of SEMIS are derived. To verify the proposed methodology, the stability parameters of two model ships in 28 loading conditions are calculated using the proposed empirical formulas and the principal calculation methods, respectively, and then compared. The developed SEMIS efficiently evaluates the ships’ stability using only GM.
Highlights
For navigationof ofships, ships,maintaining maintainingsufficient sufficientstability stability accordingInterFor the safe navigation according to to Internanation MaritimeOrganization (IMO)stability regulations is essential.to lack the lack of tion MaritimeDueDue to the of sufsufficient stability, many ship capsizing accidents have been reported, such as the Golden ficient stability, many ship capsizing accidents have been reported, such Golden RayRay car car carrier carrier accident accident on 88 SeptemberSeptember 2019 in Georgia, the United States, and the Dolgorae gorae fishing fishing vessel on 5 September 2015 in the Chuja Islands, as shown in Figure 1 [1,2]
After calculating GM, the other seven Internanation MaritimeOrganization (IMO) intact stability parameters were calculated using simple empirical formulas according to the variable of GM
After calculating GM, the other seven IMO intact stability parameters are calculated using simple empirical formulas according to the variable of GM in Phase II
Summary
Monitoring thethe stability parameters of the the IMO requirements is required to provide an about alert about theofrisk the safety of stability ships’ stability. Intact stability pacomplex without ship loading software or equipment. To evaluate ships’ intact stability parameters, a convenient methodology to simplythem calculate them isasnecessary as a supplementary arameters, convenient methodology to calculate is necessary a supplementary method for method for ships in the absencesoftware of loading software or equipment. Based on the stability parameters of 336 loading conditions loading conditions of model ships, empirical formulas of SEMIS are derived. To verify the proposed methodology, the posed methodology, stability two model ships are in 28 loading conditions are calcustability parameters ofthe two modelparameters ships in 28 of loading conditions calculated using the proposed lated using the proposed empirical andmethods, the principal calculation respectively, empirical formulas and the principalformulas calculation respectively, andmethods, compared.
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