STABILITY TESTING
EMCsq Vessel Wrytha

Overview of EMCsq. Stability Program

Vessel Stability testing is our Specialty, EMCsq. employs all electronic equipment that exceeds ASTM requirements for accuracy and has been USCG approved for previous Incline Experiments under USCG witness for COI vessels.

EMCsq. has performed Stability Test for USCG COI & Society Classed vessels including Liftboats, Crewboats, "T" & "K"vessels, Tugs and Fishing vessels >79' in the following amounts: Incline Experiment = 107, Deadweights New vessel = 168, Deadweights in-service vessel = 97, Simplified = 43, for a total of 415 Stability Booklets issued to June, 2006.

Our system includes LASER measurements for Freeboard measuring, Electronic Liner Displacement measurement for Pendulum readings & Loadcells for weights, along with a host of other electronic equipment for collecting weather data and other pertinent information needed to conduct a through incline experiment. All of the equipment is connected to an onsite computer system for fast & accurate results with automatic record keeping and calculation of the incline, thus reducing the time required to perform the test and the down time of the vessel. EMCsq has developed a program that automatically calculates the incline as the incline progresses and stores the results in a 28 page spread sheet for printout. If there is a problem with the incline at each movement the results are checked for accuracy and consistency thus avoiding any problems. The average time to accomplish a review of the vessel, take measurements and perform an incline with employing the loadcell method is about 1 ½ hours, the actual time spent inclining the vessel is about 20 minutes (10 min. per side). This minimizes the environmental effects on the vessel to give an accurate incline.

Equipment; Laptop with 17” screen, Electronic Pendulums, LASER Freeboard & Distance, Sonar & SG Kit.

Electronic Levels used for Trim & other observation, 50k lb Loadcell with connection pivot, 200k lb Loadcell

Continuing research into the accuracy of incline testing of a vessel

EMCsq is dedicated to the research and devolvement of improving the accuracy of incline testing. EMCsq has been developing a method of the physical inclining a vessel without the use of added weights that cause a multitude of inaccurate data. By employing a loadcell to incline the vessel exact loading conditions can be established, such as wind loading or crane loading. Also the exact desired degree of heeling can be made and repeated as much as the tester needs. This allows the incline test to be set up in three (3) or four (4) inclinations per side matching an exact degree of heel per inclination per side. In using this method the water plane of a vessel is not Falsely loaded and the vessel is allowed to float about its natural axis and hull configuration. EMCsq has been testing and comparing this method on Fishing vessels since 2000 and has found it a more accurate way of inclining a vessel due to the fact that the incline can be done within 20 minutes per side thus avoiding any environmental changes along with no changes to the natural heeling about the axis of the vessel. The link below is a report in PDF published by EMCsq using a controlled environment study testing different hull shapes in a test tank employing both the weight and loadcell methods of inclining.

Thank you for visiting!
EMCsq Vessel Wrytha