A ship operates using mainly four main kinds of liquids : fuel or diesel oil, lube oil, fresh water, and sea water. These liquids are stored at various places on the ship in their dedicated tanks. Apart from these, there are other liquids such as oily bilge and sludge are also generated on board from … Continue reading COFFERDAM VS VOID SPACE



If you are in steel industry, have you ever notice what all those chemical composition listed on a steel materials test report really mean? You may only know different steel grade has many different chemical composition and elements in different amount. Here in this post, we sort out and list 21 chemical elements and effects on … Continue reading ALLOY ELEMENT AFFECTION IN STEEL PROPERTIES

Main Engine Shaft Alignment – Comprehension

What is shaft alignment condition? "A static condition observed at the bearings supporting the propulsion shafts." The basic procedure for determining vertical alignment of shafting and gears is to calculate, for the cold condition at time of aligning, a shape of shaft line that will produce in the hot operating condition essentially equal loads on … Continue reading Main Engine Shaft Alignment – Comprehension

Design draft vs Scantling draft

The Draft, as simple definition is the distance between the sea level and the bottom of hull (included the thickness of bottom - see this topic) Meanwhile, at the initial design stage, there are two terms of Scantling & Design draft which are making the surveyor/designer confusing sometime. As defined as below: Design Draught, (T-DESIGN) … Continue reading Design draft vs Scantling draft