Originally Posted by
j.sabourn
#35 Johnny , Can’t remember the exact figures to give you a good idea of the stiffness or tenderness of the ship , perhaps one of the others may remember to give you the metercentric height ( your GM ) The first part is you count the seconds the ship rolls from the upright to port or starboard then back again to the upright and rolls the other way and then back to the upright . The total time in seconds is then divided by a certain number to give your GM in feet and inches. A big GM is usually considered as the ship is not going to capsize but on the other hand can be too big and the return to the upright can be too violent. A tender ship small GM
Is the opposite slow and lazy roll but any changes in the size of your GM such as shifting cargo can be hazarduous to your health. If you can find that magic number , on your next cruise dazzle these ships officers with your knowledge , good sailings and hope the weather stays good on your next voyage. That magic figure thinking back may be the ships beam . Cheers JS.