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Verification of LOCOPIAS for EBIS

Posted on February 6, 2018

This manual is intended to explain how to verify the Loading Computer System (LCS). The LCS, in this case LOCOPIAS, must be verified at regular intervals to check the correct functioning of the loading instrument. EBIS is asking for a Class approved ship stability calculation program for on-board use and there muest be records indicating that the operational accuracy of the ships stability calculation program is tested regularly.

The manual is in English and Dutch.

Hopper stability integrated into PIAS’ Loading module

Posted on February 6, 2018

Already for some decades, PIAS has the capability to compute intact and damage stability for open-top hopper vessels, e.g. as required by the dr-67 & dr-68 regulations for hopper dredgers with a reduced freeboard. This function, which was available in a separate PIAS module, has recently be integrated in PIAS’ standard stability module, called Loading. With this enhancement the hopper stability computations can now be combined with all Loading’s tools and options, and is now also available for the LOCOPIAS on-board loading software. More details of the new modus operandi can be found in the manual.

Example of stability output, indicating cargo and eater levels.

Lloyd's Register Type Approval LOCOPIAS extended

Posted on January 25, 2018

SARC is pleased to announce the extension of LR (Lloyd’s Register) Type Approval for their LOCOPIAS on-board loading computer software. This approval certifies LOCOPIAS products for use in LR class ships in the (damage) stability and longitudinal strength of the vessel.

“We are very happy with this certification,” said Herbert Koelman, Managing Director of SARC. “Not only does this help support our ship building and engineering customers, as well as their suppliers, but all of our customers.” Koelman explains, “Having passed the stringent LR approval, is a statement of the durability and reliability of our products.”

LOCOPIAS is on-board loading computer software. Derived from the PIAS ship design software, it uses the same proven technology to achieve optimum loading within the limits for strength, stability, draft, etc. This ensures maximum safety of the vessel, it’s crew, cargo or passengers and the environment. The certificate can be found here.

Update of stability criteria in PIAS

Posted on January 10, 2018

A number of standard stability requirements have been programmed, an overview is presented in the figures below.

Second generation intact stability criteria scan

Posted on November 14, 2017

You might know that IMO is currently developing an additional set of intact stability criteria, the so-called “Second generation intact stability criteria”. It is expected that its development will be finalized around 2019, so it might become sensible to verify some of your ships or designs against these criteria. An occasional PIAS user is already working on that, but for those who lack the time or resources SARC offers this as a service.

To make sure this won’t happen

Given a ship design and an intact stability booklet, the scan consists of evaluating a number of loading conditions (with a maximum of 5) against those particular 2nd gen.stab. criteria which have reached a certain state of maturity:

  • Parametric roll, first level, and second level (C1 factor only).
  • Pure loss of stability, level one and two (however, the latter without the relaxation of wave height up to the highest 3%).
  • Surfriding and broaching, first level.
  • Dead ship stability, first level.
  • Excessive acceleration, first level.

The deliverable will be a report with results and conclusions.

Please find here a leaflet with more details.

Symposium on Chinese and Dutch Yacht building processes

Posted on November 6, 2017

Last month the RYDC organized a bilateral talk on Dutch and Chinese Yacht Engineering Technology and Cooperation on October 26th in Seven Star Bay, Shenzhen. At this symposium the following companies gave a speech (from left to right):

  • SARC (Herbert Koelman)
  • University of Delft (Jenny Coenen)
  • University of Twente (Robert Wendrich)
  • University of Wuhan (Prof. Cai Wei)
  • Mastership (Jacques Hoffmans)
  • Hey Sea (Allen Leng)
  • Moana Yachts (Chris Wang)

One of the goals of the PIB project is to create business cooperation’s and technology transfer between Dutch and Chinese yacht building industry. The PIB-project by RDYC exists of a Road Show program to present the Consortium technology and of a Knowledge-to-Knowledge (K2K) symposium with Universities and industry experts to explore the possibilities of business cooperation’s and technology transfer between the Dutch and Chinese yacht building industry.
The focus of the K2K symposium will be on the yacht design and production process in both countries and to find the similarities and differences.

More info about the RDYC can be found here.

Modified computation method for ullage & sounding under heel or trim

Posted on October 4, 2017

PIAS’ Layout module is able to produce tank sounding tables with a variety of parameters and units. Commonly, if the ullage or sounding parameters are included in such a table, those are determined in a user-defined sounding pipe, which can exist of two or more points. The latter to model curved or knuckled pipes. Additional, it is also possible to define just a single point, which is then used as the reference point for ullage or sounding. Conventionally, for such a case the ullage or sounding was computed under the assumption that the measuring tape goes through this reference point in a vertical direction. On September 22, 2017, this mechanism has been changed, and now a direction perpendicular to the water plane (so, including the effect of heel and trim) is applied, which is more realistic.

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SAIMENA award at Hiper for SARC’s Herbert Koelman

Posted on September 19, 2017

On September 13, Herbert Koelman received a best presentation award out of the hands of the chairman of the South African Institute of Marine Engineers and Naval Architects for his presentations held at the HIPER (High-Performance Marine Vehicles) conference held in Zevenwacht, South-Africa.

Kevin Watson (left, SAIMENA) and the two price winners Anriëtte Bekker (middle, Stellenbosch University) and Herbert Koelman (right, SARC).

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Assessment of intact and damage stability to PS and SB in PIAS

Posted on September 5, 2017

In PIAS, for each particular project of vessel the side of heel for intact and damage stability calculations is user-configurable, where the options are:

  1. Portside (PS).
  2. Starboard (SB).
  3. The side of the statical angle of inclination. With this setting, the side of the worst stability is estimated with this method: if this statical angle is to PS then the calculation is made to that side, otherwise to SB.
  4. Portside and starboard. With this setting there will be no a priori assumption on the “worst side”, instead the stability will be calculated to PS as well as SB, while both sides are fully taken into account in the stability assessment.

The first three options have been available in PIAS from its beginning, the fourth option was added by the end of 2016.

In a separate document Assessment of intact and damage stability to PS and SB in PIAS the background of this feature is described into some detail.

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Calculation of stability around the weakest heeling axis

Posted on July 11, 2017

PIAS, as many other stability programs, has from its conceptualization in the 1980s determined the intact and damage stability (or, to be more precise, the GZ) with respect to centerline plane. That is not always correct, in particular with hull shapes which are significant asymmetrical in longitudinal direction the GZ should be determined with respect to a rotated plane (rotated around a vertical axis). Occasionally, people have inquired for a possible extension of PIAS towards the effects of stability around the axis of weakest stability, and the recurring reply of SARC was that this would certainly be feasible, and could be produced on order. In 2017 that was finally implemented in PIAS.

In a separate document Calculation of stability around the weakest heeling axis with PIAS the background of this feature is described into some detail.


You don’t want this to happen

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