This document establishes the mandatory regulatory framework for pilot signals required by merchant vessels operating within British jurisdiction. The text originates from the British government's legislative body, serving as a formal statutory instrument to standardize maritime communication protocols. It provides the legal requirements for visual and auditory signals used by ships to request or indicate the presence of a pilot, ensuring consistency in maritime safety operations.

This document is a technical legal instrument intended for maritime professionals, legal researchers, and shipping compliance officers. Experts categorize this as a foundational regulatory text for understanding the specific statutory obligations of vessels operating in British waters during the 1970s.