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This course is a free introduction to the key concepts of celestial navigation for mariners. It is divided into three courses, Getting Started in Celestial Navigation, Going Further in Celestial Navigation and Advanced Concepts in Celestial Navigation. It is highly recommended to take these courses in this order.

Weak signals are subtle signs or indicators which may indicate that some of the barriers intended to prevent an incident are failing or missing. Weak signals can be observed in equipment, human factors and near misses.

In this course, we will learn the importance of keeping our barriers strong and understanding when some of these barriers may be weakening. We will watch a video that will go through two very different scenarios with very similar outcomes and then analyse this video to see what could have been done better.

Cholelithiasis, or gallstones, is a highly prevalent medical problem especially in developed countries, affecting 10% to 15% of the adult population. It is also a leading cause of hospital admissions and health care utilisation related to gastrointestinal problems. Although some significant risk factors are non-modifiable such as advanced age, gender and heredity, some are also lifestyle-related such as obesity, rapid weight loss and sedentary lifestyle. Given the lifestyle-related risk factors of cholelithiasis, seafarers may be at increased risk due to the circumstances on board.

This short course will take you through an introduction and overview of the FarSounder Argos 3D Forward Looking Sonar (3D-FLS) navigation products.

We all live with hazards every day and as a team, we work hard to try and prevent them by taking sensible precautions every day to reduce our exposure to hazards. Thinking about the hazards that might be around us, is a very human thing to do. It's that sense of caution that makes us look for hazards, work out how to prevent them and best of all, remove them altogether. You can use something called the hierarchy of control to help you do just that. It helps you to think about the choices you can make to deal with all kinds of hazards in a step-by-step way.

Extending the life of a teak deck and protect your investment with regular cleaning, maintenance and repairs. The ultimate decking choice is teak because of its durability, anti-slip properties, rot resistance, insulation and of course, its beauty. To maximise its value - clean it properly, lightly sand it once each year and inspect it for potential repairs. A properly maintained deck can last 5 to 15 years longer than one that is poorly maintained.

DENJET CE20-500 Pump maintenance guide.

This course deals with the synoptic analysis of the wind, the clouds and the cold and warm fronts.

This course is the first of many courses on the conjoined topic of both meteorology and sailing; it is a course based on Basic Marine Weather Training to show how marine meteorology is beneficial to all seafarers.

This course explains all the basic principles of weather formation.

This course focuses on weather models and synoptic charts.