Glossary Archive

IALA

The International Association of Lighthouse Authorities (IALA) is an international organisation that aims to promote safe, efficient, and sustainable navigation by coordinating the efforts of national and regional lighthouse authorities worldwide. IALA develops and maintains standards and guidelines for maritime navigation aids, such as lighthouses, buoys, and beacons, to ensure consistency and interoperability across different...


ICC

An official document that certifies a person's ability to operate a pleasure craft in countries that recognise it.  The International Certificate of Competence (ICC) is a standardised qualification that demonstrates a boater's competency to operate a pleasure craft in international waters where it is recognised. It is issued by authorised national authorities and is often...


Code Flag India (I)

The International Maritime Signal Flag India. Meaning I am altering course to port.


ICON

A numerical weather prediction model that uses a grid system based on an icosahedron to simulate atmospheric processes with high resolution and accuracy.  The ICOsahedral Nonhydrostatic model, often abbreviated as ICON, is a cutting-edge numerical weather prediction model used by meteorologists to forecast weather patterns with high precision. This model utilises a unique grid system...


ICOsahedral Nonhydrostatic model

A numerical weather prediction model that uses a grid system based on an icosahedron to simulate atmospheric processes with high resolution and accuracy.  The ICOsahedral Nonhydrostatic model, often abbreviated as ICON, is a cutting-edge numerical weather prediction model used by meteorologists to forecast weather patterns with high precision. This model utilises a unique grid system...


ICS

A system of flags, codes, and symbols used by ships to communicate essential messages and ensure safety at sea, regardless of language barriers. The International Code of Signals (ICS) is a globally recognised communication system designed to facilitate clear and unambiguous exchanges between vessels and between ships and shore stations. Established in the early 19th...


IDL

An imaginary longitudinal line located at approximately 180 degrees longitude serving as the demarcation where the calendar date changes by one day when crossed. The International Date Line (IDL) is a conceptual boundary on the Earth's surface, primarily situated along the 180th meridian in the mid-Pacific Ocean. It is not a straight line but zigzags...


IHO

An intergovernmental organisation dedicated to ensuring the uniformity and standardisation of hydrographic and nautical charting practices globally to support safe navigation and the sustainable use of marine environments. The International Hydrographic Organization (IHO), established in 1921 and headquartered in Monaco, is the principal authority for coordinating global hydrographic efforts. Its primary aim is to ensure...