What is one of the key features of inland rules?

One of the key features of inland rules is that they include special anchorage areas. Inland rules are a specific set of navigation regulations that govern the movements of vessels in inland waters, which encompass rivers, lakes, and certain coastal areas. These rules are designed to enhance safety and orderliness in these often-congested waters.

Special anchorage areas are designated zones where specific regulations apply to vessels both in terms of anchoring and navigation. These areas are important because they help to manage traffic and ensure that vessels can safely anchor without interfering with navigational channels or other marine activities. By including provisions for these areas, inland rules provide clear guidelines that are essential for maintaining safe navigation and anchoring practices, thereby reducing the risk of accidents.

In contrast, the other options do not accurately reflect the nature of inland rules. They are not limited to daylight hours, do not apply to the open ocean, and do not supersede international maritime laws; instead, they complement them where applicable.