12npa 50

What does the symbol           mean

• Anchorage (area)

• Anchorage (small vessel)

• Anchorage (large vessel)

• Anchorage prohibited

The light of a south cardinal mark signifies how many flashes in a group

• Uninterrupted

• Three

• Six followed by 1 long flash

• Nine

The color used for a special mark is

• Black and yellow

• Red ang black bands

• Yellow

• Red and white stripes

What type of mark when seen during daytime, is colored with red and black horizontal bands

• Cardinal marks

• Isolated danger mark

• Safe water mark

• Special mark

The light of a west cardinal mark signifies how many flashes in a group

• Uninterrupted

• Three

• Six

• Nine

The light of an east cardinal mark signifies how many flashes in a groups

• Uninterrupted

• Three

• Six

• Nine

Under IALA B buoyage sustem, a buoy displaying a green light will be left to which of the following

• To port

• To starboard

• Both a and b

• Neither a nor b

Type of mark erected on, or moored on or above, an isolated danger of limited extent is called

• Cardinal mark

• Isolated danger mark

• Safe water mark

• Special mark

Which of the following is the color of the light displayed by a special mark

• White

• Red

• Green

• Yellow

Mark used to indicate that there is navigable water all around the mark is called

• Cardinal mark

• Isolated danger mark

• Safe water mark

• Special mark

Type of cardinal mark the color of which is black above yellow is called

• North

• South

• West

• East

Which of the follwing countries belong to IALA region B

• Australia

• Europe

• Africa

• Japan

Conspicuous objects or characteristics fromation of land whose position is known and which aids the mariner in establishing his position is calle

• Clearing mark

• Landmark

• Night mark

• Sea mark

Under the IALA A buoyage system, a buoy displaying a green light will be left in what direction

• To port

• To starboard

• Both a and b

• Neither a nor b

Which of the following are specially equipped vessels anchored at specific locations to serve as aids to navigation

• Tugboats

• Light sector

• Light ships

• Private aids

A type of mark wherein the colot is red and white vertical stripes is called

• Cardinal mark

• Isolated danger mark

• Safe water mark

• Special mark

It is a structure exhibiting a major light designed to serve as an aid to navigation is called

• Beacon

• Buoys

• Lighthouse

• Lighship

Type of mark whose apex points together is called

• North

• South

• West

• East

What does the smbols    means

• Light buoy

• Position of light

• Lighted offshore platform

• Aeronautical light

Characteristic of light wherein the total duration of light in a period is equal to the total duration of darkness is called

• Fixed

• Flashing

• Occulting

• Isophase

Characteristic of light which displays continuously and steadily is called

• Occulting

• Flashing

• Isophase

• Fixed

When will you rely on the position of floating aids to navigation

• During daylight

• During clam weather

• When inside the harbor

• When no fixed aid is avaiable

The light of an isolated danger mark signifies how many flashes in a group

• Single flash

• Two

• Three

• Six

Under IALA B buoyage system, a buoy displaying a red light will be left in what direction

• To port

• To starboard

• Both a and b

• Neither a nor b

Type of  cardinal mark the color of which is black below yellow is called

• North

• South

• West

• East

Time required for a light to go through a full set is called

• Flashing

• Period

• Occulting

• Light phase

Characteristic of light wherein the total duration of light in a period is longer than the total duration of darkness is called

• Fixed

• Flashing

• Occulting

• Isophase

If all these land marks are charted, which of them is less reliable

• Buoy

• Island

• Light house

• Mountain peak

Which of the following is a light placed on or near the support of the main light

• Subsidiary light

• Sector light

• Direction light

• Leading light

The light of a special mark signifies how many flashes in a group

• Single flash

• Group of five flashes every 20 seconds

• Three

• Six

What does the symbol            mean

• Light buoy

• Aeronautical light

• Position of light

• Lighted offshore platform

Characteristic of light wherein the total duration of light in a period is shorter than the total duration of darkness is called

• Fixed

• Flashing

• Occulting

• Isophase

Which of the following is the abbreviation for alternating light

• Alt

• Alter

• Alt lt

• Al lt

Which of the following is the abbreviation for fixed light

• F

• Fi

• Fl

• F x L

The following are the uses of cardinal marks except

• Indicates the deepest water

• Indicates a recreation zone

• Indicates the safe side

• Emphasized a bend

Which of the following is a light presenting different appearance, over various part of the horizon of interest to maritime navigation

• Subsidiary light

• Sector light

• Direction light

• Leading light

Which of the following is the distance from the position abvoe the surface of the earth from the line of sight to the horizon

• Geographic range

• Horizon distance

• Luminous range

• Charted visibility

Mark used in conjunction with the compass to indicate where the mariner may find the best navigable water is called

• Cardinal mark

• Isolated danger mark

• Safe water mark

• Special mark

A natural or artificial mark used to assist a vessel in avoiding a particular hazard is called

• Sea mark

• Land mark

• Night mark

• Clearing mark

What does the symbol              AERO mean

• Light buoy

• Position of light

• Lighted offshore platform

• Aeronautical ligt

What does the symbol wks mean  

• Wreckage

• Wreck always partially submerged

• Sunken wreck

• Wreck over which depth is known

The maximum distance at which a light can be seen under atmospheric condition of the existing visibility is called

• Geographic range

• Luminous range

• Nominal range

• Two ranges

The following are used of a special mark except

• Traffic separation marks

• Mid channel buoys

• ODAS buoys

• Spoil ground marks

• Landmark

• Triangular beacon

• Square beacon

• Beacon

The diffused glow observed from the light below the horizon due to atmospheric scattering is called

• Elevation

• Look

• Phase

• Intensity

What does the symbol                             mean

• Light buoy

• Position of light

• Lighted offshore platform

• Aeronautical light

A light showing over a very narrow sector, forming a single leading light is called

• Subsidiary light

• Sector light

• Direction light

• Leading light

The maximum distance at which a light can be seen when under the meteorological conditions of the prevailing visibility is called

• Geographic range

• Luminous range

• Nominal range

• Two ranges