How is a sailor referred to until they cross the equator?

A sailor who has not yet crossed the equator is referred to as a Polywog. This term specifically designates those who have yet to participate in the initiation rites typically associated with crossing the equator, which often include a ceremonial process. Once a sailor successfully crosses the equator and participates in these rituals, they earn the title of Shellback, symbolizing their transition from a Polywog to one who has completed this significant maritime milestone.

The terminology surrounding this tradition illustrates the importance of maritime culture and the sense of camaraderie among sailors. The distinction between Polywogs and Shellbacks is part of naval folklore and is celebrated in various navies around the world.

In contrast, the terms Old Salt and Greenhorn have different meanings within maritime language. An Old Salt refers to an experienced sailor, while a Greenhorn denotes someone who is new and lacks experience at sea. These terms do not specifically relate to the crossing of the equator, making them irrelevant in this context.