DECISION SUPPORT SYSTEM
The capability to widen the ship operative window, remaining within safety margins, allows to perform same activities (offshore platform maintenance, pipe laying, offshore wind installation, etc.) in a shorter time: saving time means saving money.
A useful instrument in this perspective is the SNS – Safe Navigation System – developed by CETENA. It provides the Master with an overlook of the actual and foreseen dynamic behaviour of the ship, in terms of ship motions and dynamic loads on the hull: forecasting of ship behaviour in rough seas supports ship officers in deciding speed and route to perform a safe navigation and operation at sea for a longer time. Motions and loads are computed on the basis of the actual/foreseen ship status and response amplitude operators previously calculated for the selected ship.
The patented SNS system accounts for still water, wave and whipping loads.
The availability of real time information on ship structures is a further support to safely protect ship asset, cargo and crew; for this reason CETENA has developed ESNS - Enhanced Safe Navigation System – an innovative on board system combining structural data measurements and motions/loads forecasting.
The ESNS represents the most innovative system for safety on board. It combines HMS and SNS capabilities in a hybrid system, using few sensors to measure the actual structural behaviour of the ship and response amplitude operators to forecast the expected dynamic loads even simulating the effect of alternative navigation parameters/weather conditions. Data combination and interaction lead to higher accuracy forecasting and constitute an enhanced decision support system.
The ESNS allows to widen the ship operative window, to safely manage ship structure and payload, to evaluate and predict the ship fatigue life, to increase the operational efficiency with very low installation impact on board.
For ESNS and HMS systems, CETENA has developed a post-processing tool capable of visualizing and analyse all recorded data and to long-term extrapolate both statistical and fatigue data over configurable time ranges. Thanks to structural data analysis tool it is possible to assess the actual ship use and behaviour against its design operative profile and to keep under control the integrity of the hull structures – both in a maximum experienced stress and in a fatigue perspective – giving way to manage the ship structures maintenance in a CBM perspective.
Engineering solutions tailored on ship needs