Which publication requires infrequent corrections?

The Sailing Directions (Planning Guide) is designed to provide navigational information for the planning of voyages. This publication covers a broad area and is not frequently updated, which means it requires infrequent corrections compared to other navigational documents.

The Sailing Directions are intended to assist mariners in understanding the important features of sailing areas and identifying potential hazards. Because of the comprehensive nature of this material and the longer intervals between necessary updates, it can sit for a time without requiring significant revisions.

In contrast, other publications like the List of Lights, Coast Pilot, and Radio Navigation Aids tend to undergo more regular updates and corrections based on continuous changes in navigational aids, local regulations, and safety information. Therefore, they would necessitate more frequent revisions to ensure mariners have access to the most current data, making the Sailing Directions (Planning Guide) the correct choice for requiring infrequent corrections.