How to Design a Ship

How to design a ship? How to go from a blank sheet of paper to a sensible design for a ship, when you have nothing to start with? So here are my secrets revealed.

Stability Letters Explained

For small vessels, the major problem with stability letters is explaining it to the captains. Today I will review a stability letter and give plain English interpretation of all the boring mumbo-jumbo.
shipwreck. Capsized ship.

Free Surface Moment

Without proper management, the shifting liquid in a ship’s tanks can create a lethal scenario. Free surface moment (FSM) is one of the most frequently misunderstood elements in ship operation. The deck officer that values their life wants to understand free surface moment. The physics behind it, and how it applies to ship operating limits.
Improve Engineering Value: Extract the Most from Engineering Simulations

Improve Engineering Value

We all want to feel good about paying for engineering analysis. Sometimes the best answer drives us to maximize value, rather than minimize cost. In those cases, you do better to go beyond basic safety and search for enhancements. Today we discuss four engineering tasks where you can maximize your value. Extract every last drop of knowledge from your engineering project.

Stability Fails at Seakeeping

Stability and seakeeping are frequently misunderstood. To understand the limits of these sciences, we must unveil the motivation behind their development. How to guarantee ship safety on an uncertain ocean?
Graph: Hullform Design Space

Video: Selecting the Right Hullform

Monohull, catamaran, trimaran . . . so many choices. Which hullform to pick? Can we draw upon any science to guide our choices, or we beg Lady Luck to guide us? This article provides a rational and design map for selecting hullforms applicable to any type of mission. This organized approach allows us to see past the limitations of historic examples and consider new alternatives.

GHS Tutorials: Macros and Scripting

GHS is nothing without macros.
Title Testing List and Loll

Do We Have a Problem: Testing for List and Angle of Loll

EVER WASTE MONEY ON SPECIALISTS!  Here are a few simple-do-it-yourself tests to check for ship list and angle of loll.
Angle of Loll Title Page

Angle of Loll: Hidden Dangers to Stability

PANIC! That should be your reaction if your ship developed a permanent list. Angle of loll shines like a bright red warning sign, indicating serious stability problems. Today we discuss an angle of loll (AOL): what it is, how to find it, and what to do about it.

GHS Tutorials: Structural Analysis

Did you know that GHS can also do structural analysis?  Often, we only require a simple longitudinal strength analysis.  GHS provides all the tools for this.  

Keep An Even Keel: Dealing With Ship List

Why is Ship List Bad? If ignored, it continues grow and place your ship at risk.  Be proactive and stop the list once you first suspect it.  Your crew

GHS Tutorials: Intact and Damage Stability

How to perform a stability analysis in GHS? These tutorials explain the process.

More GHS Tutorials: Reports And Hydrostatics

General Hydrostatics (GHS):  The de facto standard software for hydrostatics and stability in the USA. Watch these tutorials to learn GHS.
Extreme Roll

Extreme Stability

Ship stability is not about operations in normal weather. See a few examples of how stability protects you from extreme emergencies.
Ship Capsize

Stability Decay

Did you know that a perfectly stable vessel can become unstable and useless?  Understand how stability decay affects your vessel life.