COLREG 1972 and Navigational Watchkeeping Practice Flashcards

A comprehensive set of fill-in-the-blank flashcards covering the COLREG 1972 articles, steering and sailing rules, lights and shapes, sound signals, and IMO navigational watchkeeping recommendations.

According to Article IV, the Convention enters into force __________ months after at least $15$ States with combined merchant fleets of at least $65$ per cent of the world fleet have become Parties.

$$12$$

On the date of entry into force of the 1972 Regulations, they replace and abrogate the International Regulations for Preventing Collisions at Sea __________.

$$1960$$

Under Rule 3, the word __________ includes every description of water craft, including non-displacement craft, WIG craft, and seaplanes.

vessel

A vessel is considered __________ when she is not at anchor, or made fast to the shore, or aground.

underway

The term __________ means any condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms, or other similar causes.

restricted visibility

Rule 5 requires every vessel to maintain a proper __________ by sight and hearing as well as by all available means appropriate in the prevailing circumstances.

look-out

A risk of collision shall be deemed to exist if the __________ of an approaching vessel does not appreciably change.

compass bearing

A vessel proceeding along a narrow channel shall keep as near to the __________ of the channel which lies on her starboard side as is safe and practicable.

outer limit

In a traffic separation scheme, a vessel shall, if obliged to cross traffic lanes, do so on a heading as nearly as practicable at __________ to the general direction of traffic flow.

right angles

A vessel is deemed to be overtaking when coming up with another vessel from a direction more than __________ degrees abaft her beam.

$$22.5$$

In a head-on situation, two power-driven vessels meeting on reciprocal courses shall each alter her course to __________ so that each shall pass on the port side of the other.

starboard

The __________ light is a white light showing an unbroken light over an arc of the horizon of $225$ degrees.

masthead

Sidelights show an unbroken light over an arc of the horizon of __________ degrees.

$$112.5$$

A 'flashing light' under Rule 21(f) means a light flashing at regular intervals at a frequency of __________ flashes or more per minute.

$$120$$

In vessels of $50$ metres or more in length, the masthead light must be visible at a minimum range of __________ miles.

$$6$$

A power-driven vessel of less than $50$ metres in length is not obliged to exhibit a __________ masthead light abaft of and higher than the forward one.

second

When the length of a tow exceeds $200$ metres, the vessel shall exhibit a __________ shape where it can best be seen.

diamond

A vessel 'not under command' shall exhibit __________ all-round red lights in a vertical line.

two

A vessel restricted in her ability to manoeuvre shall exhibit three lights in a vertical line: the highest and lowest being __________ and the middle being __________.

red; white

A vessel constrained by her draught may exhibit three all-round __________ lights in a vertical line or a cylinder.

red

According to Rule 32, a __________ blast is defined as a blast of about one second's duration.

short

Under Rule 34, two short blasts on the whistle mean 'I am altering my course to __________'.

port

In or near an area of restricted visibility, a power-driven vessel making way through the water shall sound one prolonged blast at intervals of not more than __________ minutes.

$$2$$

The distress signal consisting of the group __________ in Morse Code indicates a vessel is in need of assistance.

…---… (SOS)

The __________ of the watch is the master's representative and his primary responsibility at all times is the safe navigation of the vessel.

officer

If a vessel is nearing a bend where other vessels may be obscured, she shall sound one __________ blast.

prolonged

The relief of an officer of the watch should be __________ if a manoeuvre or other action to avoid a hazard is taking place at the time of relief.

deferred

The officer of the watch should notify the master immediately if __________ visibility is encountered or suspected.

restricted