Aids to Navigation Flashcards
6 cards from real Coast Guard Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Aids to Navigation flashcards as text
What color is a port-side buoy (left side when returning from sea) in the US lateral marking system?
Answer: Red
In the US lateral system, red buoys mark the port side when returning from sea, following the 'Red Right Returning' rule.
What shape is a nun buoy?
Answer: Conical (pointed top)
Nun buoys have a conical, pointed top and are typically red, marking the starboard side of a channel when departing.
What does a flashing green light on a buoy indicate?
Answer: Port side of channel when entering from sea
A flashing green light marks the port side of a channel when entering from seaward, corresponding to odd-numbered buoys.
What does a safe water mark (fairway buoy) look like?
Answer: Red and white vertical stripes
Safe water marks have red and white vertical stripes and indicate navigable water on all sides, typically placed at channel entrances.
What is the significance of the number on a lateral buoy?
Answer: Odd numbers on port side, even numbers on starboard side entering from sea
Odd-numbered buoys are on the port side and even-numbered buoys are on the starboard side when entering a channel from seaward.
What does a yellow buoy primarily indicate?
Answer: Special purpose or caution area
Yellow buoys mark special-purpose areas such as anchorages, fish net areas, or military exercise zones, and do not indicate channel sides.