daymarks (region B)![click to hear](/images/speaker.jpg)
System B combines lateral and cardinal marks. It is the opposite of system A, in which starboard marks are red and port marks are green.
lateral mark ![click to hear](/images/speaker.jpg)
Red or green buoy that indicates the port or starboard limits of the channel.
safe water mark ![click to hear](/images/speaker.jpg)
Buoy signaling that the water is navigable.
secondary channel ![click to hear](/images/speaker.jpg)
Navigation lane with beacons that is longer or more difficult than the preferred channel.
preferred channel ![click to hear](/images/speaker.jpg)
Navigation lane with beacons; it is the shortest and safest way to a harbor or for navigating near a coast or through a waterway.
isolated danger mark ![click to hear](/images/speaker.jpg)
Buoy marking an isolated danger zone beyond which the waters are navigable.
East cardinal mark ![click to hear](/images/speaker.jpg)
Buoy with two base-to-base topmarks that is placed to the east of a danger zone.
South cardinal mark ![click to hear](/images/speaker.jpg)
Buoy with two topmarks pointing downward that is placed to the south of a danger zone.
pillar buoy ![click to hear](/images/speaker.jpg)
Floating beacon with a pylon-shaped superstructure.
conical buoy ![click to hear](/images/speaker.jpg)
Floating beacon with a cone-shaped superstructure.
spar buoy ![click to hear](/images/speaker.jpg)
Long tubular buoy used in harbors and in waters that have no tides.
port hand ![click to hear](/images/speaker.jpg)
Mark the ship must keep on the left side of its prow as it navigates a channel.
West cardinal mark ![click to hear](/images/speaker.jpg)
Buoy with two point-to-point topmarks that is placed to the west of a danger zone.
light ![click to hear](/images/speaker.jpg)
Encoded light beam that serves as a navigation aid at night.
special mark ![click to hear](/images/speaker.jpg)
Buoy marking an area that is regulated for a specific use (such as military exercises or fishing) or contains submerged obstacles (such as cables or pipelines).
starboard hand ![click to hear](/images/speaker.jpg)
Mark the ship must keep on the right side of its prow as it navigates a channel.