QUIZ 118 - 27/4 (solution)
QUIZ 118 - 27/4 (solution)
Situation in which a ships bottom is touching the seafloor
Abaft
Aside
Afloat
Aground
The situation in which a ship's bottom is touching the seafloor is called "aground." This typically occurs when a ship runs aground, meaning it becomes stuck on a sandbar, coral reef, or other underwater obstacle. In this situation, the ship's keel or bottom is resting on the seafloor, which can cause damage to the ship and potentially lead to it being stranded until it can be refloated or rescued.
Ground tackle means
use of anchors
use of ground ropes
use of ground floor
None of them
Ground tackle is a term used in maritime industry and refers to the equipment used to anchor a vessel to the seafloor. The ground tackle is typically composed of an anchor, a length of chain, and a line or rope. When a ship needs to anchor, the anchor is lowered from the bow of the ship and onto the seafloor, using the chain and rope to keep the vessel in place.
The anchor is a heavy, typically metal, object designed to hold a ship in place. Anchors come in different shapes and sizes, with different designs and weights depending on the size and type of the ship, the type of seafloor, and the environmental conditions. The most common types of anchors used are the plow anchor, the fluke anchor, and the claw anchor.
The chain is used to connect the anchor to the ship and is typically made of steel or other strong materials. The chain helps to keep the anchor from dragging on the seafloor, while also providing additional weight to help hold the ship in place. The chain is usually attached to the ship through a mechanism called a windlass, which is a type of winch that can be used to lift or lower the anchor as needed.
The rope or line is used to connect the chain to the ship's deck and to provide additional tension to keep the ship in place. The rope is typically made of synthetic materials such as nylon or polyester, which have high tensile strength and can resist degradation from the sun, saltwater, and other environmental factors.
Ground tackle is an essential part of any ship's equipment, and it is important for safe and secure anchoring in a variety of conditions. Proper maintenance and inspection of the ground tackle are necessary to ensure that it is functioning properly and can hold the ship in place in adverse weather or environmental conditions.
Gyrocompass always shows
Magnetic North
Compass North
True North
None of these
A gyrocompass always shows true north. Unlike a magnetic compass, which is affected by local magnetic fields and may not show true north, a gyrocompass relies on the rotation of the Earth to find true north. It uses a gyroscope, a spinning wheel that resists changes in orientation, to maintain a fixed direction in space as the Earth rotates underneath it. This allows the gyrocompass to determine true north based on the rotation of the Earth, rather than the local magnetic field. Gyrocompasses are commonly used on ships and aircraft to provide accurate directional information.
A Position established at a specific time with high degree of accuracy is
fix
running fix
course
None of these
A position established at a specific time with a high degree of accuracy is called a fix. In navigation, a fix refers to the determination of the vessel's position using various navigational methods such as GPS, radar, sextant, or visual bearings. The accuracy of a fix can vary depending on the method used and the conditions under which it is taken, but a high degree of accuracy is generally desired to ensure safe navigation. A running fix, on the other hand, is a series of fixes taken over time to track the vessel's position and course.
Colour of Towing light is
Green
White
Red
Yellow
The towing light is a navigational light used to indicate that a vessel is towing another vessel or an object such as a barge, pontoon or log. The light is displayed at the stern of the towing vessel and helps other vessels in the vicinity to identify the towing vessel and its direction of travel. The colour of the towing light is important for other vessels to know what kind of tow is underway and how to approach the towing vessel.
The International Regulations for Preventing Collisions at Sea (COLREGS) specify the colours of navigation lights and their positioning on a vessel. According to the COLREGS, the towing light should be a yellow light placed above the stern light. The stern light is white in colour and is placed at the stern of the vessel. The yellow towing light should be at least 1 metre above the stern light and should have the same horizontal range as the stern light.
The purpose of the yellow towing light is to indicate that a vessel is towing another vessel or object. The yellow colour is chosen because it is distinct from the green, red and white lights used for other navigational purposes. The yellow light indicates that the vessel is engaged in a special activity and that other vessels should take necessary precautions while approaching it.
In summary, the towing light is a yellow light placed above the stern light to indicate that a vessel is towing another vessel or object. It helps other vessels in the vicinity to identify the towing vessel and take necessary precautions while navigating in its vicinity.
Piloting is also known as
Radio navigation
coastal navigation
celestial navigation
None of these
Coastal navigation is the process of navigating a vessel or aircraft along the coast using charts, landmarks, and other visual aids. It involves determining a vessel's position relative to the shoreline, identifying navigational hazards, and planning safe routes. Coastal navigation is an important skill for sailors, fishermen, and other boaters who operate near shore, as well as for pilots who fly near coastal areas. Coastal navigation is typically done using a combination of traditional methods such as dead reckoning, compass bearings, and visual sightings, as well as modern electronic navigation tools such as GPS and radar.
Colour used to express distress message
orange & red
white and black
yellow and green
none of these
In piloting or aviation, the colors orange and red are often used to indicate areas or objects of potential danger or obstruction. For example, orange and red markings may be used to denote a construction area or a runway that is temporarily closed or obstructed. Additionally, red and white markings are used to indicate the boundaries of a runway or taxiway. These color codes are defined by international standards and are used to improve safety during aircraft operations.
Graphical representation of a ships course is called as
course line
Echogram
ship route
None of these
Lines drawn on a special charts joining all places with the same variation are known as
Rhumb line
Isogonic lines
Marine lines
None of these
The lines drawn on a special chart joining all places with the same magnetic variation are known as "isogonic lines". Isogonic lines connect points on a chart with the same magnetic variation or declination, which is the angle between true north and magnetic north. The lines are drawn on charts to allow navigators to correct for magnetic variation when using a compass for navigation.
A "rhumb line" is a line of constant bearing that crosses all meridians of longitude at the same angle, which is also known as a "loxodrome". Rhumb lines are commonly used for navigation, especially on long ocean voyages.
"Marine lines" is not a commonly used term in navigation or cartography, so it is not the correct answer.
Three letter signals starting with letter ‘M’ are allotted for
Medical section
Military section
Urgent Message
None of them
Three-letter signals starting with the letter 'M' are allotted for the "Medical section" in international communications. These signals are used to indicate medical conditions, supplies, or personnel on board a vessel or aircraft. They are part of the International Code of Signals, which is a standardized system of communication used by ships and aircraft to communicate important messages.
Examples of three-letter signals starting with 'M' include:
MAA: Medical advice or assistance required
MEB: Person is critically ill or injured and requires immediate medical evacuation
MFP: Medical facilities present on board
MMS: Medical staff on board
The military also uses three-letter signals, but they typically start with the letter 'Z' rather than 'M'. "Urgent Message" is not a specific category of three-letter signals, but rather a general description that can apply to any message that requires immediate attention or action.
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