Online Boating Navigation Rules & Regulations Flashcards
7 cards from real OBS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Online Boating Navigation Rules & Regulations flashcards as text
Two sailing vessels are on a collision course. Vessel A is on a starboard tack and Vessel B is on a port tack. Which vessel must give way?
Answer: Vessel B, because it is on a port tack
When two sailing vessels are on opposite tacks, the vessel on the port tack (Vessel B) must give way to the vessel on the starboard tack.
Which of the following is a 'safe speed' requirement under the Navigation Rules?
Answer: A speed at which you can take proper action to avoid collision given your vessel's stopping distance and maneuverability
Safe speed means a speed where you can take effective action to avoid collision and stop within an appropriate distance given conditions.
What does a green can buoy mark when you are returning from sea to port?
Answer: The left side of the channel — keep it to port
Green can buoys mark the port (left) side of the channel when returning from sea — keep them on your left.
If a vessel hears five or more short blasts from another vessel, what does this signal mean?
Answer: Danger — the other vessel is in doubt about your intentions or actions
Five or more short blasts is the danger/doubt signal, indicating serious concern about risk of collision or that the other vessel's intentions are unclear.
Under the Navigation Rules, what is the definition of a 'narrow channel'?
Answer: A channel where the rule to keep to the starboard side applies because the channel limits maneuvering
A narrow channel under the rules is one where vessels must keep to the starboard side because the channel constrains their ability to maneuver freely.
At night, a vessel displaying a white light forward and a white light aft (both all-round) with no sidelights is most likely what type of vessel?
Answer: A vessel under 7 meters making less than 7 knots
A vessel under 7 meters in length not exceeding 7 knots may show just an all-round white light forward and aft instead of full sidelights.
When must a power-driven vessel give way to a sailing vessel under the Navigation Rules?
Answer: When the sailing vessel is the stand-on vessel and is not overtaking the power vessel
A power-driven vessel must give way to a sailing vessel except when the sailing vessel is overtaking — the overtaking vessel always gives way regardless of propulsion.