Rebooting SOLAS – impact of drafts on damage survivability of cruise ships

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The prevailing probabilistic damage stability concept, as outlined within SOLAS 2009 for passenger ships, calculates the Attained Subdivision Index based upon three loading conditions which combine to form a theoretical draft range for a given vessel. To each of these loading conditions a weighting factor is then applied to account for the probability that a vessel will be operating at or near any of these drafts at the time of collision, should one occur. Currently the weighting factors are applied in a ‘one-size-fits-all’ manner, with the same weightings to be applied in the case of cargo vessels and passenger vessels despite the fact that these ship types are known to have very different tendencies when it comes to the nature of their operation. This in turn calls into question the suitability of these weightings with regards to what degree they in fact reflect the operational profile of the vessels covered by the standard. With this in mind, the present paper aims to investigate the suitability/accuracy of the currently assumed draft weighting factors with regards to cruise vessels. This study is conducted using operational loading condition data sourced from 18 ships and spanning up to a period of two years in some cases. On the basis of this data, draft probability distributions are derived and new weighting factors are formed specifically pertaining to cruise ships and the nature of their operation. Finally an assessment is conducted looking into the impact of the newly derived weighting factors on the magnitude of the Attained Subdivision Index and recommendations are made on how best to implement them.
LanguageEnglish
Title of host publicationProceedings of the 13th International Conference on the Stability of Ships and Ocean Vehicles
EditorsNaoya UMEDA, Toru KATAYAMA, Atsuo MAKI
Place of PublicationKobe, Japan
Pages663-674
Number of pages12
Volume1
Publication statusPublished - 16 Sep 2018
Event13th International Conference on the Stability of Ships and Ocean Vehicles - Kobe International Conference Center, Kobe, Japan
Duration: 16 Sep 201821 Sep 2018
Conference number: 13
http://stab2018.naoe.eng.osaka-u.ac.jp/index.html

Conference

Conference13th International Conference on the Stability of Ships and Ocean Vehicles
Abbreviated titleSTAB2018
CountryJapan
CityKobe
Period16/09/1821/09/18
Internet address

Fingerprint

Ships
Probability distributions

Keywords

  • SOLAS
  • cruise Ship
  • probabilistic damage stability
  • attained subdivision index

Cite this

Paterson, D., Vassalos, D., Atzampos, G., Boulougouris, E., Cichowicz, J., & Luhmann, H. (2018). Rebooting SOLAS – impact of drafts on damage survivability of cruise ships. In N. UMEDA, T. KATAYAMA, & A. MAKI (Eds.), Proceedings of the 13th International Conference on the Stability of Ships and Ocean Vehicles (Vol. 1, pp. 663-674). Kobe, Japan.
Paterson, Donald ; Vassalos, Dracos ; Atzampos, Georgios ; Boulougouris, E. ; Cichowicz, Jakub ; Luhmann, Henning. / Rebooting SOLAS – impact of drafts on damage survivability of cruise ships. Proceedings of the 13th International Conference on the Stability of Ships and Ocean Vehicles. editor / Naoya UMEDA ; Toru KATAYAMA ; Atsuo MAKI. Vol. 1 Kobe, Japan, 2018. pp. 663-674
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title = "Rebooting SOLAS – impact of drafts on damage survivability of cruise ships",
abstract = "The prevailing probabilistic damage stability concept, as outlined within SOLAS 2009 for passenger ships, calculates the Attained Subdivision Index based upon three loading conditions which combine to form a theoretical draft range for a given vessel. To each of these loading conditions a weighting factor is then applied to account for the probability that a vessel will be operating at or near any of these drafts at the time of collision, should one occur. Currently the weighting factors are applied in a ‘one-size-fits-all’ manner, with the same weightings to be applied in the case of cargo vessels and passenger vessels despite the fact that these ship types are known to have very different tendencies when it comes to the nature of their operation. This in turn calls into question the suitability of these weightings with regards to what degree they in fact reflect the operational profile of the vessels covered by the standard. With this in mind, the present paper aims to investigate the suitability/accuracy of the currently assumed draft weighting factors with regards to cruise vessels. This study is conducted using operational loading condition data sourced from 18 ships and spanning up to a period of two years in some cases. On the basis of this data, draft probability distributions are derived and new weighting factors are formed specifically pertaining to cruise ships and the nature of their operation. Finally an assessment is conducted looking into the impact of the newly derived weighting factors on the magnitude of the Attained Subdivision Index and recommendations are made on how best to implement them.",
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author = "Donald Paterson and Dracos Vassalos and Georgios Atzampos and E. Boulougouris and Jakub Cichowicz and Henning Luhmann",
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Paterson, D, Vassalos, D, Atzampos, G, Boulougouris, E, Cichowicz, J & Luhmann, H 2018, Rebooting SOLAS – impact of drafts on damage survivability of cruise ships. in N UMEDA, T KATAYAMA & A MAKI (eds), Proceedings of the 13th International Conference on the Stability of Ships and Ocean Vehicles. vol. 1, Kobe, Japan, pp. 663-674, 13th International Conference on the Stability of Ships and Ocean Vehicles, Kobe, Japan, 16/09/18.

Rebooting SOLAS – impact of drafts on damage survivability of cruise ships. / Paterson, Donald; Vassalos, Dracos; Atzampos, Georgios; Boulougouris, E.; Cichowicz, Jakub; Luhmann, Henning.

Proceedings of the 13th International Conference on the Stability of Ships and Ocean Vehicles. ed. / Naoya UMEDA; Toru KATAYAMA; Atsuo MAKI. Vol. 1 Kobe, Japan, 2018. p. 663-674.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Rebooting SOLAS – impact of drafts on damage survivability of cruise ships

AU - Paterson, Donald

AU - Vassalos, Dracos

AU - Atzampos, Georgios

AU - Boulougouris, E.

AU - Cichowicz, Jakub

AU - Luhmann, Henning

PY - 2018/9/16

Y1 - 2018/9/16

N2 - The prevailing probabilistic damage stability concept, as outlined within SOLAS 2009 for passenger ships, calculates the Attained Subdivision Index based upon three loading conditions which combine to form a theoretical draft range for a given vessel. To each of these loading conditions a weighting factor is then applied to account for the probability that a vessel will be operating at or near any of these drafts at the time of collision, should one occur. Currently the weighting factors are applied in a ‘one-size-fits-all’ manner, with the same weightings to be applied in the case of cargo vessels and passenger vessels despite the fact that these ship types are known to have very different tendencies when it comes to the nature of their operation. This in turn calls into question the suitability of these weightings with regards to what degree they in fact reflect the operational profile of the vessels covered by the standard. With this in mind, the present paper aims to investigate the suitability/accuracy of the currently assumed draft weighting factors with regards to cruise vessels. This study is conducted using operational loading condition data sourced from 18 ships and spanning up to a period of two years in some cases. On the basis of this data, draft probability distributions are derived and new weighting factors are formed specifically pertaining to cruise ships and the nature of their operation. Finally an assessment is conducted looking into the impact of the newly derived weighting factors on the magnitude of the Attained Subdivision Index and recommendations are made on how best to implement them.

AB - The prevailing probabilistic damage stability concept, as outlined within SOLAS 2009 for passenger ships, calculates the Attained Subdivision Index based upon three loading conditions which combine to form a theoretical draft range for a given vessel. To each of these loading conditions a weighting factor is then applied to account for the probability that a vessel will be operating at or near any of these drafts at the time of collision, should one occur. Currently the weighting factors are applied in a ‘one-size-fits-all’ manner, with the same weightings to be applied in the case of cargo vessels and passenger vessels despite the fact that these ship types are known to have very different tendencies when it comes to the nature of their operation. This in turn calls into question the suitability of these weightings with regards to what degree they in fact reflect the operational profile of the vessels covered by the standard. With this in mind, the present paper aims to investigate the suitability/accuracy of the currently assumed draft weighting factors with regards to cruise vessels. This study is conducted using operational loading condition data sourced from 18 ships and spanning up to a period of two years in some cases. On the basis of this data, draft probability distributions are derived and new weighting factors are formed specifically pertaining to cruise ships and the nature of their operation. Finally an assessment is conducted looking into the impact of the newly derived weighting factors on the magnitude of the Attained Subdivision Index and recommendations are made on how best to implement them.

KW - SOLAS

KW - cruise Ship

KW - probabilistic damage stability

KW - attained subdivision index

UR - http://stab2018.naoe.eng.osaka-u.ac.jp/

M3 - Conference contribution

VL - 1

SP - 663

EP - 674

BT - Proceedings of the 13th International Conference on the Stability of Ships and Ocean Vehicles

A2 - UMEDA, Naoya

A2 - KATAYAMA, Toru

A2 - MAKI, Atsuo

CY - Kobe, Japan

ER -

Paterson D, Vassalos D, Atzampos G, Boulougouris E, Cichowicz J, Luhmann H. Rebooting SOLAS – impact of drafts on damage survivability of cruise ships. In UMEDA N, KATAYAMA T, MAKI A, editors, Proceedings of the 13th International Conference on the Stability of Ships and Ocean Vehicles. Vol. 1. Kobe, Japan. 2018. p. 663-674