Nested curves in the shape of a hull section beneath a horizontal red line marking the waterline

STABLESHIP

STABLESHIP starts from the real waterline. Three or more draft sensors provide the points that the waterplane is fitted to, and from that plane come the drafts at the four marks, the heel and the trim, all at once. Coming from the same fit, they agree with one another, and the panel also shows how well that plane matches what the sensors are reading, so one that starts to drift shows up before it contaminates the result.

On top of that waterline the stability margin is computed. The rolling period gives GM, the vessel’s hydrostatic tables give the metacentre and the displacement for the current condition, and the real KG follows. That KG is compared against the admissible KGmax held in the vessel’s own table, and the result is expressed as a percentage: how much margin is left. The panel changes colour as the thresholds set by the vessel are crossed.

The figures are the vessel’s own and not a generic approximation. The hydrostatic and KGmax tables are imported from its stability booklet, and the hull cross-section is entered once.

Benefits

Load on judgement, not on spare margin
Knowing how much stability margin is genuinely left means using the hold instead of leaving room free just in case.
The margin measured, not estimated
KG stops being a figure from the stability booklet and becomes the one for the condition the vessel is in right now.
With the vessel's own figures
The hydrostatic and KGmax tables are the vessel's own, imported from its booklet. No generic approximations in between.
A drifting sensor fools nobody
The panel shows how well the waterplane matches what the sensors read, and how far each one strays. That tells you whether the margin on screen can be trusted, which in stability is half the job.
On the sensors already fitted
Three draft sensors are enough to fit the waterplane. The more there are, the better the fit and the clearer it is when one starts to drift.
The whole watch, not just the instant
Moving averages over one minute, one hour and twelve hours, to tell rolling apart from a trend that is building.

Capabilities

Drafts at the four marksBow and stern, port and starboard. The waterplane is fitted from the sensors and the marks are derived on the hull's real cross-section.
Heel and trimBoth come from the waterplane itself, so they agree with the drafts on display instead of being a second reading to argue with.
Critical stabilityThe real KG for the current condition against the admissible KGmax, expressed as a percentage: how much margin is left.
GM, KMT and displacementThe rolling period gives GM, the hydrostatic tables give KMT and displacement, and KG follows. All four are shown, not just the result.
Quality of the fitCoefficient of determination and the deviation of each sensor, on screen. A sensor starting to drift shows up before it spoils the calculation.
Your own thresholds, colour codedThe vessel sets its warning and critical thresholds. The panel moves from green to amber to red, so the state reads at a glance from the bridge.
Sensor calibrationEach sensor's height is corrected from the drafts observed at the marks, with no need to measure by hand again.
The vessel, with its own dataHydrostatic and KGmax tables imported from the vessel's booklet, and the hull cross-section entered once.
Moving averagesOne minute, one hour and twelve hours over drafts and angles, to separate rolling from a real change of condition.
Continuous loggingEvery calculation cycle can be written to file, at the interval and path configured.
Panel in the browserOpens from any machine on the vessel's network, with live data and no reloading.
Spanish and EnglishA complete interface in both languages, with the configuration area kept separate and password protected.

Maritime sectors

Does it fit your vessel?

Tell us about the installation you have and we will tell you what it would take.

Let’s talk

STABLESHIP

Benefits

Load on judgement, not on spare margin

The margin measured, not estimated

With the vessel's own figures

A drifting sensor fools nobody

On the sensors already fitted

The whole watch, not just the instant

Let’s buildwhat comes next.