How often are continuous yard line markings used on the field?

Continuous yard line markings are used every 5 yards on the football field. This marking provides a visual reference for players, coaches, referees, and spectators, making it easier to gauge the progress of the ball during a play. The 5-yard intervals help maintain consistency across the field, as each set of five yards is clearly delineated, providing a strategic advantage during gameplay by allowing for quick assessment of distance to gain.

The 10-yard and 15-yard markings do appear on the field, but they are not continuous—these are primarily for indicating specific distances or penalties rather than providing a uniform guide throughout the entire field. Therefore, the correct and most beneficial answer is indeed every 5 yards as it enhances clarity and plays a crucial role in the flow of the game.