What does not under command mean

The term “vessel not under command” means a vessel which through some exceptional circumstance is unable to maneuver as required by these Rules and is therefore unable to keep out of the way of another vessel.

What is an example of a vessel not under command?

For example, a vessel not under command is supposed to display different lights when underway and when making way. Also a vessel need to sound different sound signals when underway and when making way. So what is the difference between a vessel that is underway and when it is making way.

Can you consider a vessel drifting as vessel not under command?

This is the reason why most of them prefer choosing the AIS ‘NUC’ option. However, as has already been explained, a drifting vessel with her engines and steering in perfect working condition can never be considered to be in a NUC situation.

Why is a ship not under command?

Ships are required to report their navigational status and as well as NUC ships can announce that they are underway by engines, moored, constrained by draft or use one of several other signals available to them. This MarineTraffic article explains the terms.

Under what situation or circumstances can a vessel considered to be not under command give 4 examples?

Exceptional circumstances are: steering gear failure, engine failure, electrical supply system failure, fire, flooding, uncontrollable cargo shifting and stability issue.

How does a vessel not under command be determined from a vessel restricted in her ability to maneuver by the lights they display?

(a) A vessel not under command shall exhibit: (i) two all-round red lights in a vertical line where they can best be seen; … (b) A vessel restricted in her ability to manoeuvre, except a vessel engaged in mine clearance operations, shall exhibit: (i) three all-round lights in a vertical line where they can best be seen.

What is the best description of a vessel not under command?

The term “vessel not under command” means a vessel which through some exceptional circumstance is unable to manoeuvre and is therefore unable to keep out of the way of another vessel, (COLREG).

What is a RAM vessel?

As defined in Rule 3(g) of the Navigation Rules, a vessel restricted in her ability to maneuver (also called a RAM vessel) is one “which from the nature of her work is restricted in her ability to maneuver as required by [the Navigation Rules], and is therefore unable to keep out of the way of another vessel.” The …

Is drifting making way?

The word “underway” means a vessel is not at anchor, or made fast to the shore, or aground. “Making way” means the vessel is making way through water. If the vessel is drifting and moving with current, she is underway but not making way.

What is the importance of Colreg?

The International Regulations for Preventing Collisions at Sea 1972 (COLREGs) are a set of rules to be followed by navigation officers to avoid collisions at sea. It is one of the most important International Conventions that all seagoing Officers must understand and be able to apply to real world situations.

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What are NUC lights?

The Master stated that he required the “Not Under Command” (NUC) lights to be exhibited while the ship was drifting. Many of these vessels exhibit NUC lights while drifting. … Rule 3(i) defining a vessel underway seemed clear enough as did Rule 23(a) defining the lights to be exhibited by a vessel underway.

What does it mean when a boat is drifting?

be in motion due to some air or water current. “The leaves were blowing in the wind”; “the boat drifted on the lake”; “The sailboat was adrift on the open sea”; “the shipwrecked boat drifted away from the shore”

What is the sound signal for a vessel not under command?

A vessel not under command, a vessel restricted in her ability to manoeuvre, a vessel constrained by her draught, a sailing vessel, a vessel engaged in fishing and a vessel engaged in towing or pushing another vessel shall, instead of the signals prescribed in paragraphs (a) or (b) of this Rule, sound at intervals of …

What light are shown by a vessel not under command?

Not under command two all-round red lights in a vertical line where they can best be seen; two spherical shapes in a vertical line where they can best be seen; and. when making way through the water also normal sidelights and a sternlight (not shown in the examples below).

What is a vessel constrained by her draft?

“(h) The term “vessel constrained bv her draught” means a power-driven vessel which, because of her draught in relation to the available depth and width of navigable water, is severely restricted in her ability to deviate from the course she is following.”

What are good seamanship and special circumstances?

The Court in such judgment established that COLREGS, in Rule 2, requires more than just following the specific Rules for preventing collisions that the COLREG sets forth and stated that sometimes “good seamanship” means departing from those Rules when special circumstances, including the limitations of the vessels …

When can a vessel be considered as being underway?

A vessel is said to be underway if it meets the following criteria: It is not aground. It is not at anchor. It has not been made fast to a dock, the shore, or other stationary object.

What sound signal is made by a vessel not under command when in or near an area of restricted visibility?

A vessel not under command, a vessel restricted in her ability to manœuvre, a vessel constrained by her draught, a sailing vessel, a vessel engaged in fishing and a vessel engaged in towing or pushing another vessel shall, instead of the signals prescribed in paragraphs (a) or (b) of this Rule, sound at intervals of …

What is a separation zone or separation line?

separation zone or line: a zone or line separating traffic lanes in which ships are proceeding in opposite or nearly opposite directions; or separating a traffic lane from the adjacent sea area; or separating traffic lanes designated for particular classes of ship proceeding in the same direction.

What should a vessel not under command do when approaching a vessel engaged in fishing if there is risk of collision?

A vessel engaged in fishing shall not impede the passage of any vessel following a traffic lane. When two power-driven vessels are crossing so as to involve the risk of collision, the vessel which has the other on her own starboard side shall keep out of the way and avoid crossing ahead of the other vessel.

What day shape must a vessel not under command show?

Boat not under command: The day shape for this is two balls. That’s one ball on top of another. One red light on top of another red light signals this at night. Boat is restricted in ability to maneuver: The day shape to indicate this is a ball on top of a diamond on top of another ball.

What is a vessel not restricted in her ability to maneuver?

The term “vessels restricted in their ability to maneuver” shall include but not be limited to: (i) A vessel engaged in laying, servicing, or picking up a navigational mark, submarine cable or pipeline; (ii) A vessel engaged in dredging, surveying or underwater operations; (iii) A vessel engaged in replenishment or …

What does it mean when a ship is at anchor?

phrase. If a boat is at anchor, it is floating in a particular place and is prevented from moving by its anchor.

What does boat underway mean?

The word “underway” means that a vessel is not at anchor, or made fast to the shore, or aground.

What does restricted waters mean?

Restricted water usesA declaration of a state of water supply conservation shall include one or more of the following restrictions, conditions, or requirements limiting the use of water as necessary to protect the water supply.

What does Restricted Manoeuvrability mean?

The term “restricted manoeuvrability” means the vessel is unable to keep out of the way of another vessel. It also includes: A vessel engaged in laying, servicing, or picking up a navigational mark, submarine cable or pipeline. A vessel engaged in dredging, surveying or underwater operations.

What Colour are navigation lights?

The red light indicates a vessel’s port (left) side; the green indicates a vessel’s starboard (right) side. Sternlight: This white light is seen only from behind or nearly behind the vessel. Masthead Light: This white light shines forward and to both sides and is required on all power-driven vessels.

What were naval Rams made of?

The rams made in the 3rd century bc, however, were different: they were cast in bronze with complicated internal construction allowing them to be tightly riveted to the outside of the bows. The rams resemble three stout shovels cast together, presenting a triple-bladed weapon to the enemy boat.

What will you check when performing your navigational watch?

Ship’s Position – Speed – Course. …
Traffic Density. …
Weather Conditions and Night Vision. …
Bridge Equipment and Dimmers. …
Logbooks – Checklists – Daily orders. …
Readiness of the Look-out/ Helmsman. …
Miscellaneous Activities on Deck or Engine room.

How do I learn COLREGs?

Mneomics for learning the collision regulations. A favourite of jack tar! …
COLREGs Posters and flash cards. …
Study Groups – A great way to learn the rules. …
Visualisation – COLREGs in images. …
COLREGs Scenarios.

What are Colreg rules?

The International Regulations for Preventing Collisions at Sea, more commonly known as the COLREGS, are quite simply, the ‘rules of the road’ for ships and other vessels at sea; they set out the conduct of vessels in any condition of visibility, in sight of each other and in restricted visibility. …