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Navigation Rules Flashcards

7 cards from real ALABAMA BOATERS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Navigation Rules flashcards as text

  1. Under the Inland Navigation Rules, what does five or more short blasts on a horn signify?

    Answer: Danger or disagreement with another vessel's maneuver

    Five or more short blasts is the danger signal, indicating doubt or disagreement with another vessel's intentions and that a collision may be imminent.

  2. A vessel engaged in towing operations exhibits which lights in addition to sidelights and sternlight?

    Answer: Two masthead lights in a vertical line and a yellow towing light above the sternlight

    A towing vessel shows two (or three if tow exceeds 200m) vertical masthead lights and a special yellow towing light above the sternlight.

  3. What does a vessel signal with three short blasts?

    Answer: I am operating in reverse (astern propulsion)

    Three short blasts means 'I am operating astern propulsion' — the vessel's engines are in reverse.

  4. What is the minimum safe speed rule designed to accomplish?

    Answer: To ensure a vessel can take proper and effective action to avoid collision

    Rule 6 requires every vessel to proceed at a safe speed so it can take effective action to avoid collision and stop within an appropriate distance.

  5. A vessel less than 20 meters in length or a sailing vessel is not required to sound fog signals in restricted visibility if:

    Answer: They are exempt — all vessels must sound fog signals

    There are no exemptions by size for fog signals in restricted visibility — all vessels must sound the appropriate signal for their status.

  6. When approaching a vessel displaying a rigid replica of the international code flag 'Alpha,' a boater should know the other vessel is:

    Answer: Engaged in diving operations with limited maneuverability

    The code flag Alpha (blue-and-white) indicates a vessel engaged in diving operations; other vessels must keep well clear and proceed at safe speed.

  7. What is the arc of visibility of a vessel's green starboard sidelight?

    Answer: 112.5 degrees

    Each sidelight covers an arc of 112.5 degrees from dead ahead to 22.5 degrees abaft the beam on its respective side.