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Flashcards in Navigational Rules Deck (16)
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The term "vessel restricted in their ability to maneuver" shall include but not be limited to:

- a vessel laying, servicing or picking up a navigation mark, submarine cable or pipeline
- a vessel engaged in dredging, surveying or underwater operations
- a vessel engaged in replenishment or transferring persons, provision or cargo while u/w
- a vessel engaged in the launching or recovery of aircraft
- a vessel engaged in mine clearing operations
- a vessel engaged in a towing operation such as severely restricts the towing vessel and her tow in their ability to deviate from their course


The term " vessel constrained by her draft " means A POWER DRIVEN VESSEL which because of her draft in relation to the available depth and width of navigable waters is:

severely restricted in her ability to deviate from the course she is following.


what does the word Underway mean?

a vessel that is not at anchor, made fast to the shore or ground.


A vessel shall be deemed in sight of one another only when?

One can be observed VISUALLY from the other


The term " Restricted visibility" means?

Any condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sand storms or any other similar causes.


what is Rule 2?

nothing in these rules shall exonerate any vessel, or the owner master or crew thereof, from the consequences of any neglect to comply with these rules or of the neglect of any precaution which may be required by the ordinary practice of seamen, or by the special circumstances of the case.


what is Rule 5?


Every vessel shall at all times maintain a proper look-out by sight and hearing as well as by all available means appropriate in the prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision


What is rule 6?

Safe speed


Rule 6, every vessel shall at all times proceed at a safe speed so that she can take proper and effective actions to avoid collision and be stopped within a distance appropriate to the prevailing circumstances and conditions. what are some factors taken into account in determining safe speed?

-state of visibility
-traffic density
-maneuverability in regards to stopping/ turning ability in conditions
-at night, background lighting or from back scatter of her own lights
-wind, sea and current and proximity to navigational hazards
-draft in relation to available depth of water


what is rule 7?

Risk of collision


Rule 7, every vessel shall use all available means appropriate to the prevailing circumstances and conditions to determine if risk of collision exists. If there is any doubt such risk SHALL be deemed to exist. What are some things involved in the process of determining if risk of collision exists?

-long range scanning
-radar plotting or the equivalent systematic observation of detected objects
-assumptions SHALL not be made on scanty information, especially scanty radar information


Rule 7, Risk of collision shall be deemed to exist if?

The compass bearing of an approaching vessel does not appreciably change. (CBDR) constant bearing decreasing range

Such risk may sometimes exist even when an appreciable bearing change is evident, when approaching a large vessel or tow, or when approaching a vessel at close range


INLAND ONLY A vessel of less than 20 meters in length at anchor at night in a "special anchorage area designated by the Secretary" __________.

Need not show any lights


INLAND ONLY At night, which lights are required on barges moored in a group formation more than two barges wide?

Two unobstructed all-round white lights


INLAND ONLY A towing vessel pushing ahead on the Western Rivers above the Huey P. Long bridge must show __________.

sidelights and towing lights


INLAND ONLY Which is CORRECT regarding a "special flashing light"?

It must be yellow in color.
It must be placed as far forward as possible.
It must not show through an arc of more than 225°.