What is the minimum height for the masthead light on a high-speed craft?

The minimum height for the masthead light on a high-speed craft is indeed determined based on the breadth of the craft. According to COLREGs regulations, a high-speed craft must adhere to specific requirements concerning the height of navigation lights, which are designed to ensure visibility and ensure safe navigation.

For high-speed craft, the masthead light must be positioned at least a certain height above the hull in relation to the breadth of the vessel. This ensures that the light is adequately visible to other vessels and meets the operational needs of a craft designed for high speeds.

This approach takes into account the typical operational environment of high-speed vessels, where they may be navigating in busy waterway conditions or areas with other maritime traffic. Therefore, the correct answer reflects the requirement that the height of the masthead light is not arbitrary but rather defined as a function of the vessel's dimensions for safety and visibility purposes.

This requirement ensures compliance with factors related to stability, visibility, and overall maritime safety, helping prevent potential collisions or navigational issues represented by poorly positioned lights.