Abstract
To evaluate the safety of passenger ships’ stability, ten stability parameters should be calculated. However, since the process for calculating all stability parameters is complex without a ship loading program, a convenient methodology to simply calculate them and evaluate the safety condition of a passenger ship is required to alert the hazard to a captain, officer, and crew. The Index for Passenger Ship Intact Stability Appraisal Module (IPSAM) is proposed herein. According to the value of a passenger ship’s metacentric height (GM) which could be calculated by the ship’s roll period measured by sensors in real-time, IPSAM simply calculates nine intact stability parameters except for and proposes the present stability status as a Single Intact Stability Index (SISI). It helps crews easily recognize the safety of passenger ships’ stability as a decision support system in real-time. Based on the intact stability parameters of 331 loading conditions of 11 passenger ships, empirical formulas for IPSAM were derived. To verify the empirical formulas of IPSAM, the stability parameters of a passenger ship in 20 loading conditions were calculated using proposed empirical formulas and the principal calculation methods respectively, then compared. Additionally, the result of the SISI of 20 loading conditions successfully indicates the danger as the value of the SISI under 1.0 of the three loading conditions that do not satisfy the IMO intact stability requirements.
Highlights
Safety of Life At Sea (SOLAS) has been a high priority in the passenger ship industry since the accident of Titanic accident in 1912 to ensure that safety levels remain high but continuously increase [1]
This meant that the empirical formulas reliably reflected the relationships between the ten International Maritime Organization (IMO) intact stability parameters of the passenger ship and the GM
For the level of “Danger”, less than 50% of the ten IMO stability parameters do not satisfy the IMO stability regulations, suitable actions to increase the stability index should be carried out
Summary
Safety of Life At Sea (SOLAS) has been a high priority in the passenger ship industry since the accident of Titanic accident in 1912 to ensure that safety levels remain high but continuously increase [1]. Ships and how to calculate the parameters and determine specific coefficients for estimated the the stability of fishing vessels based on the analysis of roll motion and the mass moment improvement of the IMO intact stability regulations. Choi [5] proposed the stability index calculation module for the assessment of ten IMO ships complying with the second-generation intact stability requirements, and it is important to evaluate these at an early design stage. The Index for Passenger Ships’ Intact Stability Appraisal Module (IPSAM) is proposed as a decision support system to determine whether a passenger ship can comply with IMO intact stability regulations It could be used as a supplement methodology for passenger ships’ crew to conveniently examine the level of the safety of the stability in real-time. The IPSAM will be able to be used as a decision support system for passenger ship’s crew to estimate the safety of the stability according to the GM calculated by roll periods measured by a sensor in real-time
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