Where must day shapes be displayed on a vessel?

Day shapes must be displayed on a vessel as far forward as practical to effectively communicate the vessel's status to others. The primary purpose of day shapes is to indicate the type of vessel operation or condition, such as whether it is at anchor, aground, or constrained by its draft. Positioning the day shapes as far forward ensures that they are visible to other vessels and helps in preventing collisions by making the vessel's activities clear at a distance.

Displaying day shapes at the front of the vessel enhances their visibility and allows other mariners to easily identify the vessel's status. This positioning is crucial, especially in busy waterways or during conditions of reduced visibility, where clear communication through visual signals is essential for safe navigation. Therefore, opting for placement as far forward as practical supports maritime safety and effective signaling at sea.