Manoeuvrability in adverse conditions: rational criteria and standards

Shigunov, Vladimir

doi:10.1007/s00773-017-0525-z

Cited by 20 publications

(7 citation statements)

References 9 publications

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“…Possibly, this limit can be increased to 15 m/s in headwind conditions. These conditions require ro-ro passenger ships with very good manoeuvring characteristics and redundancy (and duplication of propulsion system) (Shigunov 2018).…”

Section: Inner Berthsmentioning

confidence: 99%

Influence Of Hydro-Meteorological Elements On The Ship Manoeuvring In The City Port Of Split

Lušić¹,

Leder²,

Pušić³

et al. 2021

ped

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The Port of Split is located in the central part of the eastern Adriatic and is the largest Croatian passenger port. The Port of Split consists of the North Port, for the reception of mainly cargo ships, and the City Port for the reception of passenger ships. Although the port is protected from the open part of the Adriatic by a number of islands, its specific spatial position as well as local hydro-meteorological factors, primarily wind, can significantly affect the safety of navigation, and ultimately close all traffic. The entrance to the City Port is facing to the south; accordingly, the effect of southerly winds and waves will be one of the primary factors influencing the safety of manoeuvring. Also, the wider area of Split is characterized by the strong local, approximately NE wind with sudden gusts (‘’Bura’’) which is especially dangerous for navigation. This paper analyses the effect of significant hydro-meteorological factors on the safety of manoeuvring at the approach and within the City Port of Split. The influence of wind, waves, sea current, tides and visibility will be analysed. Also, these factors will be classified in order of importance with respect to those parts of the port where they predominate as a threat to manoeuvring safety. The obtained results should serve as a basis for future defining of limiting working/manoeuvring conditions.

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Section: Inner Berthsmentioning

confidence: 99%

Influence Of Hydro-Meteorological Elements On The Ship Manoeuvring In The City Port Of Split

Lušić¹,

Leder²,

Pušić³

et al. 2021

ped

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“…The 2013 interim minimum power guidelines address tankers and bulk carriers, as these ship types normally have a low design speed (thus relatively low installed power) and are most at risk when optimized for even lower EEDI values. As the scientific problem of maneuverability in waves is highly demanding, further, in-depth research efforts were devoted to the subject to examine the new guidelines as well as to enhance the understanding of the complex problem [4][5][6][7][8]. The most extensive study should be credited to projects SHOPERA and JASNAOE [9], which led to the draft revisions for the 2013 interim guidelines [10,11].…”

Section: Introductionmentioning

confidence: 99%

Minimum Propulsion Power Assessment of a VLCC to Maintain the Maneuverability in Adverse Conditions

Feng

Liu

Shang

et al. 2021

JMSE

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The International Maritime Organization (IMO) Guidelines for Determining Minimum Propulsion Power to Maintain the Maneuverability in Adverse Conditions is the sole regulation imposed on the routine design and approval of all new-built ships as a part of EEDI requirements. This study reviews the development of the guidelines and summarizes the recent amendments of MEPC76(2021). The present assessment is conducted for a new VLCC design following the new guidelines aiming at investigating the influence of alternative wave added resistance evaluation methods and the propeller design features on the assessment results. It is found that the most simple empirical formula method proposed by MEPC76 is not conservative enough, as could have been expected. On the other hand, spectral analysis methods based on empirically obtained and properly validated wave added resistance responses can produce consistent results. Moreover, discussions are made from the perspective of propeller design to meet the regulatory requirements. It is pointed out that the light running margin is a key design parameter, and propellers with larger light running margins are more advantageous for satisfying the minimum propulsion power regulation, thus ensuring the navigation safety in adverse conditions. These obtained insights and know-how can support the engineers in obtaining optimal design solutions.

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“…After a ship is launched, tests are conducted in a sea trial to guarantee the maneuverability of the vessel. External disturbances, such as wind and waves, are not considered in the aforementioned criteria, although some studies have shown that these factors have significant effects on the maneuvering performance of a ship (Paroka et al, 2017;Shigunov, 2018). The rudder angle required to maintain a ship's course increases if wind velocity and wave height increase.…”

Section: Introductionmentioning

confidence: 99%

Yaw Motion Stability of an Indonesian Ro-Ro Ferry in Adverse Weather Conditions

Perdani

Juliansyah

Putri

et al. 2020

IJTech

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The yaw motion stability and course-keeping ability of ships are important factors with regard to collision danger, particularly for ships operating in narrow channels, crowded routes, or port areas. Yaw motion may become unstable due to external forces, such as wind. To investigate yaw stability and course-keeping ability, this study developed a nonlinear dynamic system of a three-degree-of-freedom mathematical model to determine steady state equilibrium. Yaw motion behavior was then analyzed using the eigenvalue characteristic of the obtained equilibrium points. The numerical results for an Indonesian ro-ro ferry showed that the rudder angle required to maintain the ship's course tended to increase as wind velocity increased. In beam wind, the necessary rudder angle was larger than the maximum possible rudder angle when the wind velocity was 24 m/s or more. The ship could be controlled by the rudder during operation, but its yaw motion tended to be unstable in following wind. The stable oscillation of yaw motion occurs when the wind velocity is higher than 11 m/s, and the range of heading and rudder angles increases as wind velocity increases.

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Manoeuvrability in adverse conditions: rational criteria and standards

Cited by 20 publications

References 9 publications

Influence Of Hydro-Meteorological Elements On The Ship Manoeuvring In The City Port Of Split

Influence Of Hydro-Meteorological Elements On The Ship Manoeuvring In The City Port Of Split

Minimum Propulsion Power Assessment of a VLCC to Maintain the Maneuverability in Adverse Conditions

Yaw Motion Stability of an Indonesian Ro-Ro Ferry in Adverse Weather Conditions

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