Technical Articles Articles

Designing a spreader beam for lifting

Spreader beams are universally applied gear which is widely used in various types of lifting operations, onshore and offshore. In this article, we will explore the design of a basic spreader beam and see what design checks are needed to establish the suitability of a...

Protecting the seabed pipelines against destabilization: Identifying and qualifying the risk

The Philosophy Cable hydrodynamic stability is one of the most fundamental design topics which are addressed by cable installation engineers. In its simplest form, a simple force balance approach may be considered to ensure that the cable is not displacing...

Safe Towing: Calculating a towline’s catenary and sag

Introduction Towlines connect a tug to the vessel being towed and are defined by multiple characteristics like Weight, Diameter, and Stiffness. The tension in the towline during the towing operation is not static but keeps varying with the distance between the tug and...

Designing the lashings of deck cargo using IMO CSS

Introduction More than 70% of the earth is covered by water, which makes shipping historically the easiest and cheapest way of connecting manufactures and customers across the globe and can be reasonably considered to be the artery of the global economy....

Designing a clip/dog plate for seafastening

Designing a clip/dog plate for seafastening

Introduction In an earlier article, we saw how to design stoppers for seafastening. Stoppers are items that are used...

The Bulbous Bow – types, characteristics, and effects

The Bulbous Bow – types, characteristics, and effects

This is Part 2 of the two-part series on Bulbous Bows. For Part 1, click here By Tamal Mukherjee, *This...

Marine Propeller and Shafting Alignment – Part 2

Marine Propeller and Shafting Alignment – Part 2

Gap & Sag Alignment Gap and Sag Alignment is carried out to bring the engine to its final position, in case of...

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