Intact Stability Analysis
Most vessels need some form of intact stability analysis to satisfy regulatory requirements. The exact analysis and requirements depend on the flag of the vessel, vessel mission, and vessel construction type. Generally, the analysis follows a routine procedure:
- Regulatory research – determine the exact set of stability criteria
- Hydrostatic modeling
- Maximum VCG analysis
- Develop loading conditions
- Check loading conditions
- Document results in analysis report
The main deliverable from this analysis is a maximum VCG graph. It plots the limit of vessel vertical center of gravity (VCG) against a range of displacements. If the vessel VCG remains under those limits, it satisfies all intact stability criteria.
To ensure reliability, DMS goes one step further. We check the individual loading conditions against the stability criteria. Thanks to the automation of Maxsurf Stability, this is a fairly quick process.
DMS also cares about delivering practical utility to the vessel crew. Ultimately, stability analysis should be a tool for the vessel master to ensure safe operation. The best tools are easy to use and convenient. Along with the stability analysis, we also provide a free loading condition spreadsheet. This incorporates your custom tank properties and MaxVCG curves. It allows you to easily develop custom loading conditions for yourself.
Plan your own burn-ballast sequence for each voyage. Safely check transfers between tanks. Other firms may charge you tens of thousands for a fancy program that achieves the same functionality. But at DMS, we think the knowledge is more important than the appearance. That is why we automatically include the loading condition spreadsheet with each update that includes a trim and stability booklet. Want to learn more about your free loading condition spreadsheet? We’re happy to talk.
The fine print:
- Loading condition spreadsheet is NOT a substitute for a class approved loading computer. It is only a convenient tool for the vessel master.
- Stability update requires a full trim and stability booklet to provide a free loading condition spreadsheet. Stability letters and stability assessments do not receive a free loading condition spreadsheet.
Want to Learn More?
We can customize each project to meet your goals.
Find the perfect solution for your needs.
Relevant Ship Science Articles
A stability test requires extensive work to prepare the vessel. Where do you go to find that work list? This guide should give you some advanced warning of what to expect. It covers all the practical matters for a Chief Engineer to prepare for their next stability test.
Smooth stability tests require planning, and practicality. As the vessel Master, you want to prepare for this thing that completely disrupts vessel operations. But you are a busy person, and engineers are very long winded. Instead, this guide provides a brief overview, focusing on the major elements that concern you with a stability test.
What are the practical steps necessary to execute a stability test? How to avoid the pitfalls? Who do you call to arrange everything? This guide gives advice to the vessel owner on how to prepare for a stability test, from start to finish. Instead of theory, we focus on the logistics and coordination.
Certain as the sea, ships will require stability tests at some point in their life. Or maybe not. This article discusses the different types of stability tests and when regulations require them.
Stability tests do not arrive instantly after you order one. It takes time and planning, and you should expect extensive coordination with several different organizations. But the ultimate benefit justifies the expense: a ship with reliable stability performance. This article unravels some of the mystery behind a stability test and why you want one.