e-CONSULT

A specification document in which the ship’s main particulars, her functions, main equipment and systems are described. This specification provides a brief insight about the ship that will be built.

It’s a preliminary drawing of the ship’s lines which is used for calculations of speed-power, stability, carriage capacity and sea-keeping that will take place at later stages of the design project. Previously designed, similar hull form designs, which have proven their success by full scale performance measurements are one of the key elements to make such a drawing.

A draft of the midship section drawing that would include a design standing against the global and local forces and appropriate for the ship’s type and functions. By using this design document, it is possible to calculate the ship’s lightweight and the amount of steel material and therefore a more precise approach can be developed regarding the building cost of the ship.

By using the information on General Arrangement Plan, Midship Section Plan, weight of main equipment and statistical data, the light ship weight and the coordinates of the center of gravity are calculated.

Gross and Net Tonnage calculations are carried out based on relevant national and international rules and regulations. This calculation is of critical importance since it affects the fees which will be paid to ports during ship’s entire operational life.

In order to define the capacity of the generators providing necessary electricity the power need of main equipment of the ship and previous calculation experiences are used and therefore a preliminary electrical load analysis is carried out. The number and output power of the generators are determined based on the calculation of energy level that would be needed during voyage, harbor and loading-unloading operations.

Based on the pre-determined cruising range the fuel consumption calculation is done to define the capacities of the bunker tanks and the Energy Efficiency Design Index (EEDI) value.

3D model of the ship’s outer profile is prepared for design coordination and presentations.

General Arrangement Plan is a drawing where main compartments, systems and equipment of the ship are shown. This drawing which is accepted as the ship’s identity card is prepared based on customer’s need while also considering the latest applicable rules and regulations of national and international bodies.

This drawing shows the main equipment in engine room(s) and their arrangement in relevant spaces. Based on the dimension of the ship this drawing is either prepared separately or the details are shown in the General Arrangement Plan.

In order to determine the capacity, strength and weight of the mooring and anchoring equipment of the ship, Equipment Number Calculation is carried out. As a result of this calculation an information pool is formed for selection of mooring and anchoring equipment.

According to International LoadLine Convention the maximum draft value that limits the submersion of the ship is determined by Freeboard Calculation.

Using the designed hull’s parameters, the speed-power curve is drawn based on still water resistance values and propulsion variables. Still water resistance values and propulsion variables are calculated on the basis of well-known empirical methods as well as similar hull forms that have been designed and/or have been tested within a scaled model test. While calculating the power values, optimum propeller values which are determined according to open water propeller efficiency curves.

Especially for ships carrying heated or refrigerated cargoes a preliminary heating load calculation is carried out to determine the capacities of boilers and compressors.

Considering the technical, administrative and financial dimensions of the shipbuilding project all items that could be included into the cost are defined and the estimated costs are gathered within a report.

A preliminary drawing showing the arrangement of tanks and watertight compartments is prepared. Based on this work, calculations of tanks’ capacity, typical loading cases, intact and damaged stability and finally longitudinal strength are carried out.