Principles of Stability for Boaters and Marine Engineers

Name: Principles of Stability for Boaters and Marine Engineers
Rating: 4.7 (47 reviews)

Understanding what keeps ships floating upright, so that you don't have a bad day on the water!

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Created byChristopher D. Nolan

Last updated 9/2023

English

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What you'll learn

Understand the relationship between the center of gravity and the center of buoyancy.
Understand the righting moment and its impacts on stability.
Define traits that make stability better or worse.
Be prepared for maritime regulatory exams regarding stability.

Course content

5 sections • 15 lectures • 1h 18m total length

Introduction to the Course1:11
Although this course title deals with stability for boaters, it is not a mental health course, but rather a course about why ships float, why they float upright, and why they return to the upright position when they are tilted over by various forces.

The Keel, Center of Gravity, and Center of Buoyancy4:46
In this lesson we will discuss K (the keel), G (the center of gravity), and B (the center of buoyancy. These landmarks are important when learning about ship stability.
KG and GM - Two Key Measurements of Stability3:46
In this video we continue the discussion by introducing the Metacenter, and the terms GM and KG.
Ship Motions and How They Move2:24
In this video we describe the motions of a ship about each axis, including roll, pitch, yaw, sway, surge, and heave, as well as hog and sag.
First Quiz!

Reasons Why a Ship Can Tilt Over (List/Heel/Loll/Capsize)7:33
In this lesson we go in depth about the different ways ships can tilt over, including heel, list, loll, and capsizing.
GZ and the Righting Arm3:05
In this lesson we will continue the discussion about key stability points by introducing the concept of righting arm (GZ).
Hypothetical Quiz: Which Ship Would Be Harder to Tip Over??2:15
In this short lesson we'll go over a hypothetical case to help cement your understanding of righting listing forces.
Trim and Longitudinal Stability4:41
In this video we will look at stability from a different perspective, regarding longitudinal (front to back) stability.
Second Quiz!

Section Introduction0:37
This section is optional and it is about the mathematical side of stability!
Rolling Period Problems11:53
These are a common type of problem on 100 and 200 ton master exams in the USA.
Weight Shift Problems5:59
These are a common type of problem on OUPV, 100, and 200 ton exams in the USA.
Deck Load Center of Gravity Problems14:41
These problems are common on merchant mariner exams of all levels in the USA.
200 Ton Sample Exam6:32
This video solves some of the stability related problems on a 200 ton oceans master exam in the USA.
100 Ton Sample Exam7:47
This video solves some of the stability related problems on a 100 ton master exam in the USA.

Requirements

No experience is required however an understanding of boats will help.

Description

Keep floating! This course is for recreational boaters, sailors, or professional mariners looking to increase their understanding of ship stability principles and how to keep a boat or ship safely stable on the water.

In the course we will discuss the key points on a vessel such as the center of gravity and the center of buoyancy, as well as the relationship of righting arm to stability of a vessel. We'll discuss the metacenter and common stability indicators such as GM. In addition, we'll learn about common actions that make stability better or worse on boats. We'll also review certain key elements which often appear on professional examinations including several practice problems and solutions.

Using video and whiteboard lectures, this course will give you a better understanding of why ships remain upright in the water, and how they are impacted by shifting weights, wind, and seas. As an end result, you will better understand heeling, listing, and rolling period of vessels as indicators of stability.

This course is produced by Practical Navigator Training, an approved Coast Guard maritime training provider in the United States, and the instructor is Capt. Chris Nolan, a licensed mariner and tall ship captain with over 20 years of seagoing experience.

Who this course is for:

This course is for recreational boaters as well as junior ship engineers, or any professional mariner looking for a refresher on ship stability.

Principles of Stability for Boaters and Marine Engineers

What you'll learn

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Course content

Introduction1 lecture • 1min

Stability Terminology and Key Points on a Vessel3 lectures • 11min

Why Ships Tilt Over and Why They (Usually) Right Themselves4 lectures • 18min

Example Math Problems from Coast Guard Stability Exams (Optional Section)6 lectures • 47min

Course Conclusion and Where to Go Next1 lecture • 2min

Requirements

Description

Who this course is for: