Navigation Rules & Right of Way Flashcards
7 cards from real NASBLA 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 & Right of Way flashcards as text
What is required of a give-way vessel under the Navigation Rules?
Answer: Take early and substantial action to keep well clear
Rule 16 requires the give-way vessel to take early and substantial action to keep well clear, not just minor adjustments.
What action may a stand-on vessel take if it becomes apparent that the give-way vessel is not taking appropriate action?
Answer: Take action to avoid collision by its own maneuver alone
Rule 17 allows the stand-on vessel to maneuver to avoid collision when it becomes apparent that the give-way vessel is not taking sufficient action.
Two short blasts on a vessel's whistle in a meeting or crossing situation signal what intended maneuver?
Answer: I am altering my course to port
Under Rule 34, two short blasts indicate the vessel is altering course to port.
Under Rule 2 (Responsibility), what principle allows a mariner to depart from the Navigation Rules?
Answer: To avoid immediate danger when following a rule would create a greater hazard
Rule 2(b) allows departure from the rules when necessary to avoid immediate danger, balancing the letter of the law against seamanship.
What is the purpose of a danger signal under Rule 34(d)?
Answer: To indicate doubt or failure to understand the other vessel's intentions or actions
Five or more short blasts constitute the danger signal, used when a vessel is in doubt about another vessel's intentions or when a collision risk exists.
Under COLREGS, what is the definition of a 'vessel restricted in its ability to maneuver'?
Answer: A vessel which from the nature of her work is unable to maneuver as required by the rules, such as one engaged in dredging, surveying, or underwater operations
Rule 3(g) defines a vessel restricted in ability to maneuver as one limited by the nature of her work, such as dredging, laying cables, or diving operations.
What does the Navigation Rule regarding 'safe speed' require of all vessels at all times?
Answer: Every vessel shall at all times proceed at a safe speed so that she can take proper and effective action to avoid collision and be stopped within a distance appropriate to the prevailing circumstances
Rule 6 requires every vessel to always proceed at a safe speed relative to conditions such as visibility, traffic density, and vessel maneuverability.