Dayshapes must be displayed __________.

Dayshapes are visual signals displayed by vessels during daylight hours to indicate their status or activities to other mariners. The purpose of displaying dayshapes is to enhance navigational safety by providing information about the vessel's intentions, such as whether it is anchored, restricted in ability to maneuver, or towing another vessel.

The correct response highlights that dayshapes must be displayed during daylight hours in any visibility. This requirement is crucial because it ensures that other vessels can see and interpret the signals regardless of the weather conditions, except during the night when different lighting signals (like navigation lights) come into play.

Displaying dayshapes only at night or exclusively in poor weather would not fulfill the purpose of these visual signals during times when vessels are actively navigating and may need to communicate their status to other boats. Moreover, while certain dayshapes are specifically related to vessels at anchor, it is essential to remember that the broader requirement covers all scenarios during daylight, not just at anchor.