This course is designed to refresh the knowledge of basic stability theory and calculations; and the operations that are affected by a mobile offshore unit’s stability. It is comprised of four sections.
The time it will take for a student to complete the course will vary from 8 hours of course time to 16 hours of course time depending on math skills, position on vessel, and previous maritime experience.
Prerequisites
Comprehensive Stability & Ballast Control
Objective
After the completion of the course the student should be able to demonstrate the ability to understand and explain the following:
1. Stability Theory
- What is Stability
- Displacement
- Centers of Gravity
- Centers of Buoyancy
- Center of Flotation
- Metacenter
- Metacentric Radius
- Metacentric Height
- Righting Arm
- Free Surface
- States of Stability
2. Basic Stability Calculations
- Calculating Moments and CoG
- Free Surface and Corrected KG
- Mean Draft
- Tons per Inch Immersion
- Interpolation
- Calculating Metacentric Height (GML & GMT)
- List and Trim (in feet and degrees)
- Determining KG Margin
- Calculating Chain and Vertical components
- Leg Load Calculation for a Jack-up
- Deadweight Survey and calculating Lightship
3. MOU Operations
- Mooring Components
- Heavy Weather Mooring
- Adjusting for Bulls-eye
- Station keeping guidelines
- Structural Stresses and Ballasting Schedule
4. Damage and Emergency response
- Unexpected List or Trim
- Corrective Countermeasures
- Damage Ballasting Drills
- Negative Metacentric Height
Course content
Exam
There is a proctored test via zoom after the course material is complete. The instructor will answer any questions and give a small review before giving the exam. Two hours will be allotted for testing session (some students may require less time).
