The Straits feature several critical alteration points (CAPs), such as:
Contrary to open ocean sailing where the coastline is the danger, in the Straits, the danger is often lateral. The Traffic Separation Scheme is flanked by shallow, uncharted fishing zones and extensive offshore developments. The passage plan must clearly demarcate "No-Go" zones where the vessel cannot safely maneuver outside the lane.
A safe transit begins long before reaching the One Fathom Bank (OFB) or Horsburgh Lighthouse. As of February 2026, the updated is considered essential reading. Key Regulations