What is the format for representing longitude in navigation?

Longitude is typically represented in navigation using a three-digit format. This representation is crucial for precision in charting and navigation. Longitude indicates an east or west position relative to the Prime Meridian, which is located at 0 degrees.

The three-digit format can include degrees, arc minutes, and sometimes seconds. For instance, a longitude of 75 degrees west could be represented as 075 or in a more detailed form such as 75° 30' 00". This precision allows navigators to determine their position accurately on the earth's surface.

Using a format with fewer digits, such as one or two digits, would not provide sufficient detail for navigation, as it would lead to ambiguity in position. Hence, the three-digit representation is standard in navigation practices.