I am currently performing the Limiting KG test on my lightship for different displacements (tonne). However, the calculated limiting KG does not pass the criteria. Is it possible and how to solve the problem? I thought limiting KG should have passed all the criteria before it showed me the results.
The message in your results window states that the heel angle does not extend sufficiently high.
Change the heel range in Analysis | Heel and try again.
Also, Lightship is often not a seagoing condition. If the vessel will never be loaded in this way, it is okay for it to not pass this criteria.