What is the definition of Loom?

The term "loom" refers to a phenomenon that occurs when light is diffused in the atmosphere, particularly in situations where objects appear to be elevated above the horizon due to the bending of light rays. This can happen under certain atmospheric conditions, such as when there's a temperature inversion or when the sun is low on the horizon, causing objects such as land or water to appear higher than they actually are. This optical illusion is particularly important for mariners to understand, as it can impact navigation by affecting how far away objects can be seen and their true location. Through this understanding, operators can better interpret what they see on the horizon, ensuring safer navigation.

The other definitions do not align with the term “loom” as accurately, focusing instead on related but distinct concepts such as the horizon line or light reflection, which do not convey the specific atmospheric optical effects encompassed by the term.