Glossary Archive

An intergovernmental organization with a membership of 191 Member States and Territories that works to facilitate international cooperation in the field of meteorology, climatology, hydrology, and geophysical sciences.  The World Meteorological Organization (WMO) is a specialised agency of the United Nations responsible for promoting international cooperation in the field of meteorology, climatology, hydrology, and related...

World Sailing, formerly known as the International Sailing Federation (ISAF), is the governing body for the sport of sailing worldwide. Headquartered in London, World Sailing plays a pivotal role in promoting and regulating sailing on a global scale. Sailing, a sport that combines the thrill of competition with the beauty of nature, has a rich...

A specific location or reference point on a navigational route, often used to mark progress or changes in course. A waypoint is a predetermined geographical location that is used in navigation to help guide a vessel along a planned route. These points are typically defined by coordinates, such as latitude and longitude, and are entered...

The International Maritime Signal Flag Xray. Meaning Stop carrying out your intentions and watch for my signals.

Flag semaphore indicating the letter X.

International Morse Code sequence representing the letter X.

Pronounced: ECKS-ray The term for the letter X in the NATO Phonetic Alphabet.

The lateral distance and drift between a vessel's actual position and the intended navigational track or course. Cross Track Error (XTE) is a useful concept in marine navigation, particularly when using electronic navigation systems such as GPS or chart plotters. It measures how far a vessel has deviated from its planned course, expressed as a...

A yacht is a recreational boat or ship, typically larger than a standard pleasure craft. Yachts are often used for private cruising, racing, or chartering. They can range in size from small sailing to large motor yachts and are designed for leisure activities on the water.

The RYA Yachtmaster Ocean Theory course teaches celestial navigation and advanced passage planning for long-distance offshore sailing. Participants learn to use a sextant for position fixing, analyze global weather systems, and plan transoceanic voyages. This course is essential for those pursuing the Yachtmaster Ocean qualification or preparing for extended offshore adventures.