Studies on this matter showed that the rolling period test may be recommended as a useful means of approximately determining the initial stability of small ships when it is not practicable to give approved loading conditions or other stability information, or as a …

Jan 25, 2015 · Does anyone know whats going on? and another thing- is there any easy, standard procedure to measure the k of a ship about a certain axis? Dear shadman, If you consider roll equation to be linear...

This video shows a worked example to show how GM can be calculated using the formula obtained from the rolling period tests for vessels up to 70 meters in le...

If your vessel has a GM of one foot and a breadth of 50 feet, what will be your full rolling period?

At present, some prediction methods are quite unreliable, with sometimes errors in the predicted roll period of 5 to 10 s. This paper describes and compares eight methods.

Jul 2, 2011 · Find the new period of roll if a mass of 50 tonnes is discharged from a position 14 m above the center of gravity. Assume or. Ans. T 2 = 18.6 s. 1. Calculate the new displacement in tonnes (W 2). 2. Estimate the original radius of gyration (K). 3. Evaluate the new displacement and new GM (W 2 and GM 2). 4.

Mar 9, 2023 · According to the technology applied in navigational circles for determining the natural rolling period, it is required to determine the average value of the rolling period at its maximum roll in irregular waves.

The rolling period/time (also determined for the extent of ¢), is the time needed for a complete rolling from port to starboard and back to port. This can give an indication of the initial stability (GMo)' 3.10.4.d Determining maximum heel after a wind gust (¢J …

Black = calculated values. Your vessel measures 122 feet long by 18 feet in beam. If the natural rolling period at a draft of 6'-09" is 5 seconds, what is the GM?

TE can be found inputting vessel speed (kn), wave period(s), and encounter angle (α) into the diagram on the right (IMO, 2007). Adapt ship-specific guidelines using direct stability assessment. Danish Maritime Accident Investigation Board, 2014.