ShipLoad – Ship Trim and Stability calculator (www.thenavalarch.com) – with subtitles


welcome to this spreadsheet for a ship’s
trim and stability calculation developed by thenavalarch.com this spreadsheet
can be used to calculate the floating condition draft trim and stability of a
vessel or a barge as per the IMO stability requirements it provides as
output the floating condition hydrostatics and evaluates the floating
condition against the IMO stability criteria by generating the righting arm
curve it is to be noted that the spreadsheet doesn’t generate the
hydrostatic properties and cross curves of the vessel by itself and the zero
trim hydrostatics and cross curves are required as an input it is assumed that
the spreadsheet will be used for small trim ranges + / – 2 degrees let’s take a
look at the spreadsheet in detail this is the welcome sheet which can be used
to navigate through the spreadsheet to start a new vessel we click on the
button start a new vessel the spreadsheet asks for a vessel name which
is provided by user the next step is to input the principal particulars of the
vessel this includes the dimensions sign convention light ship weight projected
wind areas and bilge keel data we should save it before going back to main menu
the third step is to input the hydrostatic properties for the zero trim
/ zero heel condition in this worksheet we can see that the various hydrostatic
properties have been listed against the draft of the vessel this table can be
found in the trim and stability booklet of the vessel the user needs to input
these properties in the format provided once these properties are input the user
needs to save it the fourth step is to input the cross curves data the user is
asked to input the angles at which he wants to input the cross curves data
after this the user needs to input the data in the cross curves table this can
also be obtained from the trim and stability booklet of the vessel
fifth step is to input the locations of down flooding points this is done
through this worksheet by entering the location coordinates and the type of
down flooding point this is to be provided in the same sign Convention as
stated in principle particulars sheet the sixth step is the tank properties in
this worksheet the user should define the tanks of the vessel the type of tank
can be selected and the capacity and geometry details are to be provided if
the detailed tank characteristics are available the user can input the tank
table for each tank individually by selecting input slash and a tank table
these properties include the volume co g and f sm of the tank if the data is not
available then the tanks properties are generated by the software by assuming
that the tank volume and VC G is linearly varying with height this gives
approximate results but is useful in case of vessels with mostly rectangular
tanks like barges once all above inputs have been provided the worksheet is
ready to be used for creating a loading condition we give a name to the loading
condition this should be a unique name this generates a loading condition
worksheet with the details of lightship keyed in the tanks are also listed and
user can input the filling level in the tanks any additional items like debt
cargo or provisions can also be added once the loading condition is created
and saved the user should click solve loading condition to get the floating
hydrostatics of the vessel this will calculate and report the floating
condition Draft trim and other hydrostatic properties next is stability
evaluation for which the user needs to click the button check stability upon
clicking this button the user is asked the IMO criteria applicable whether the
IMO general criteria for all ships is to be applied or the IMO criteria for
barges is to be applied if the vessel is a regular seagoing ship the first is to
be selected if the vessel is a barge the second is
to be selected next the software generates the righting arm curve and
evaluates all the I most ability criteria and checks it against the rule
requirements it also checks the IMO wind criteria for the loading condition in a
similar way other loading conditions of the vessel can be generated and
evaluated this application can be of good use in actual vessel operations to
decide the transit condition of the vessel and evaluate its stability
entering the input data of the vessel is a one-time exercise after which the
application can be saved and used every time by creating a new loading condition
that was about ship load the application for trim and stability evaluation
developed by thenavalarch.com please visit the website to know more about it
and please provide us your valuable feedback thank you very much

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