Final answer:
The IALA B Starboard Bifurcation marker indicates a channel split where the safe route is to port, marked with a red cone topmark and specific light sequences.
Step-by-step explanation:
IALA B Starboard Bifurcation Marker Explanation:
The subject query pertains to aids to navigation, particularly within the IALA (International Association of Lighthouse Authorities) maritime buoyage system. The IALA B Starboard Bifurcation mark indicates a point where a channel splits and the preferred, or safe, channel to take is to port. The characteristics of this bifurcation mark include light sequences (Fl R (2+1) 10s), meaning the light will flash red in a group of two plus one additional flash in a ten-second period. The topmark is a red cone pointing up, and identification is typically through letters on the mark.
These navigation aids are critical for maritime safety, guiding vessels through preferred channels and helping mariners avoid potential hazards. When encountering a starboard bifurcation buoy in region B (which applies to the Americas, parts of Asia, and the Philippines), the vessel should keep the mark on its starboard (right) side when moving upstream or into the channel from the sea, but choose the port side channel as the main navigational route based on its 'preferred channel' status.