Where is the Third Substitute flown?

The Third Substitute is flown on the port outboard halyard. This practice is part of the flag signaling system used primarily in naval operations to indicate specific conditions or communications, such as the presence of a vessel or a change in status. Each substitute flag represents a different message or situation, and the port outboard position is designated specifically for this purpose. This allows for clear visibility and immediate recognition by other ships or personnel in the area, facilitating effective communication and operational readiness.

Positioning the Third Substitute on the port outboard halyard ensures adherence to established protocols for signaling and helps maintain order and clarity within naval operations. Ships follow these conventions to ensure everyone understands the messages being communicated, which is essential when coordinating movements or responses in a maritime environment.