The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform

Eric Glover - One of the best experts on this subject based on the ideXlab platform.

Serge Swalenstocker - One of the best experts on this subject based on the ideXlab platform.

  • The ballast-free ship
    2010
    Co-Authors: Havard Nordtveit Austerfjord, Serge Swalenstocker
    Abstract:

    A conventional VLCC uses ballast water for two different parts of its operations. In unloaded transit condition, the ballast is needed to obtain both a fully submerged propeller and enough Forward Draft to avoid bottom slamming. During cargo operations, ballast water is used to reduce bending moments and compensate for trim and heel.

D.r. Derrett - One of the best experts on this subject based on the ideXlab platform.

  • Trim or longitudinal stability
    Ship Stability for Masters and Mates, 2020
    Co-Authors: C.b. Barrass, D.r. Derrett
    Abstract:

    This chapter discusses trim stability. Trim is the longitudinal equivalent of list. Trim is also known as longitudinal stability. It is measured as the difference between the Drafts Forward and backward. If the difference is zero, then the ship is on even keel. If Forward Draft is greater than backward Draft, then the vessel trims by the bow. If backward Draft is greater than the Forward Draft, then the vessel trims by the stern. The chapter discusses the moment to change trim one centimeter (MCT 1 cm), which is the moment required to change trim by 1 cm. It explains how to find the change of Draft Forward and backward due to change of trim, how to find the longitudinal metacentric height by using change of trim. The chapter further discusses the effect of shifting weights already on board, and effect of loading and/or discharging weights, and explains how to find the position of the centre of flotation.

  • Aspects of Trim – The Main Factors Involved
    Ship Stability for Masters and Mates, 2012
    Co-Authors: C.b. Barrass, D.r. Derrett
    Abstract:

    The main factors involved in trim are discussed for different shaped vessels. Trim may be considered as the longitudinal equivalent of list. Trim is also known as ‘longitudinal stability’. It is in effect transverse stability turned through 90 degrees. Instead of trim being measured in degrees it is measured as the difference between the Drafts Forward and aft. If the difference is zero then the ship is on even keel. If Forward Draft is greater than aft Draft, the vessel is trimming by the bow. If aft Draft is greater than Forward Draft, the vessel is trimming by the stern. A formula to calculate the moment to change trim 1 cm (MCTC) is given, and the effect of shifting weights already on board is considered, with example calculations included.

Havard Nordtveit Austerfjord - One of the best experts on this subject based on the ideXlab platform.

  • The ballast-free ship
    2010
    Co-Authors: Havard Nordtveit Austerfjord, Serge Swalenstocker
    Abstract:

    A conventional VLCC uses ballast water for two different parts of its operations. In unloaded transit condition, the ballast is needed to obtain both a fully submerged propeller and enough Forward Draft to avoid bottom slamming. During cargo operations, ballast water is used to reduce bending moments and compensate for trim and heel.

C.b. Barrass - One of the best experts on this subject based on the ideXlab platform.

  • Trim or longitudinal stability
    Ship Stability for Masters and Mates, 2020
    Co-Authors: C.b. Barrass, D.r. Derrett
    Abstract:

    This chapter discusses trim stability. Trim is the longitudinal equivalent of list. Trim is also known as longitudinal stability. It is measured as the difference between the Drafts Forward and backward. If the difference is zero, then the ship is on even keel. If Forward Draft is greater than backward Draft, then the vessel trims by the bow. If backward Draft is greater than the Forward Draft, then the vessel trims by the stern. The chapter discusses the moment to change trim one centimeter (MCT 1 cm), which is the moment required to change trim by 1 cm. It explains how to find the change of Draft Forward and backward due to change of trim, how to find the longitudinal metacentric height by using change of trim. The chapter further discusses the effect of shifting weights already on board, and effect of loading and/or discharging weights, and explains how to find the position of the centre of flotation.

  • Aspects of Trim – The Main Factors Involved
    Ship Stability for Masters and Mates, 2012
    Co-Authors: C.b. Barrass, D.r. Derrett
    Abstract:

    The main factors involved in trim are discussed for different shaped vessels. Trim may be considered as the longitudinal equivalent of list. Trim is also known as ‘longitudinal stability’. It is in effect transverse stability turned through 90 degrees. Instead of trim being measured in degrees it is measured as the difference between the Drafts Forward and aft. If the difference is zero then the ship is on even keel. If Forward Draft is greater than aft Draft, the vessel is trimming by the bow. If aft Draft is greater than Forward Draft, the vessel is trimming by the stern. A formula to calculate the moment to change trim 1 cm (MCTC) is given, and the effect of shifting weights already on board is considered, with example calculations included.