stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Mario :p Flashcards | StudBud
Explore
/
Mario :p
Mario :p
100 terms
·
StudBud Administration
·
16 plays
Imported from external platform
Flashcards
100 cards
F
Practice quiz
P
Host live
L
Questions
100
Answers
1
How does a Taut Wire determine vessel position?
The DP processor generates angular data from the GPS system.
The DP processor receives angular data from the taut wire
The DP processor analyzes angular data from the onboard weather station.
The DP processor sends angular data to the taut wire
2
Before entering the 500m platform exclusion zone in order to conduct DP operations, it is important that
Contingency planning to monitor weather conditions has been completed
Contingency planning to secure the vessel’s cargo has been initiated
Contingency planning to establish vessel escaperoutes has been completed
Contingency planning to maintain communication systems has been established
3
When a vessel is operating in Auto-DP mode, how is the vessel's heading controlled?
Automatically by the system
Randomly by the sensors
Manually by the operator
Occasionally by the crew
4
A function of the Power Management System is to continually monitor 'Available Power'. This is:
The total power output generated continuously over time
"The maximum capacity of energy available at a specific moment."
The reserve of power at any given time
The amount of power utilized at any given time
5
The value of the DP Current as shown on the DP screen may be inaccurate. A possible reason for this is:
An unknown external force acting on the vessel and / or an unmeasured error
A measured influence from the vessel's weight
. A predictable internal force acting on the vessel
A known error in the vessel's navigation system
6
Some DP vessels are fitted with draught sensors, enabling continuous draught feedback to the DP system. This is to allow
Continuous update of the vessel model regarding changes to vessel mass.
Regular assessment of the vessel's structural integrity
Occasional adjustment of the vessel's navigation settings
Periodic review of the vessel's speed based on fuel levels
7
An Azipod Thruster will normally consist of:
All of the mentioned items
Everything listed above
All mentioned options
All of the above
8
The Equipment Class necessary for a particular operation should be decided:
By the vessel crew and client following a quick analysis of the proposed.
By the vessel owner and operator without any risk assessment of the propose
By the vessel owner and client after a partial review of the proposed
By the vessel owner and client after a full risk assessment of the proposed
9
When must the bus tie breaker according to IMO recommendations be in the 'open' position?
During Class 6 operations
During Class 3 operations
During Class 5 operations
During Class 4 operations
10
When is it advisable to deselect the wind sensor?
When a helicopter is conducting aerial surveillance around your vessel
When a helicopter is flying at a high altitude above your vessel
When a helicopter is about to land on your vessel
When a helicopter is taking off from your vessel
11
What is approximate force available from Controllable Pitch Azimuth thruster, which is going astern:
70-90 % of maximum force.
65-95 % of maximum force.
65-85 % of maximum force.
75-95 % of maximum force.
12
Which of the following affects the amount of thruster force used while maintaining station in the auto-position mode?
Predetermined pathways without external influences.
Environmental force acting on the vesel and excursion from set point,if any
Internal forces affecting the vessel's stability and position.
Static conditions experienced by the vessel at anchor.
13
A GPS receiver can use the reception of dual frequency to:
Improve accuracy by compensating for ionospheric delay.
Reduce accuracy by ignoring atmospheric conditions.
Enhance precision by averaging satellite signals.
Minimize errors by limiting the number of satellites used.
14
When using a Hydroacoustic Position Reference, acoustic reception is not adversely affected by:
Light rain
Heavy snowfall
Clear skies
Mild temperatures
15
Which of the following can cause wind model errors?
Anchoring the vessel in open water for better stability
Docking the vessel in a busy harbor for easy access
Locating the vessel in a position which is partlysheltered from the wind
Positioning the vessel in an area exposed to strong currents
16
Under which of the following conditions may positioning be improved by increasing 'Control Gain'?
When encountering stable wind or calm water conditions
When encountering increased temperature or humidity conditions
When encountering decreased wind or current conditions
When encountering increased wind or current conditions
17
About what point does a DP vessel rotate when changing heading?
The vessel's Anchor Point
The vessel's Centre of Rotation
The vessel's Center of Gravity
The vessel's Hull Shape
18
How many Position Reference Systems should be available and online during a Class 2 operation,according to IMO Recommend
6
5
3
4
19
What does the DP System use to calculate weighting (or confidence) for each Position Reference System?
Absolute distance of coordinates
Relative spread of fixes
Consistent alignment of reference points
Fixed position of landmarks
20
How many DP Computers/processors are required in an IMO Equipment Class 2 system?
At least 3
At least 4
At least 1
At least 2
21
Which is the system that uses a single transducer and a calibrated array of transponders located on the sea floor?
Radar-based positioning (RBP)
Long Baseline acoustic positioning (LBL)
Single Beam sonar positioning (SBP)
Short Baseline GPS tracking (SBL)
22
As a general rule, control of what axis will receive priority for thrust allocation when in DP mode?
Yaw
Pitch
Surge
Roll
23
Catastrophic failures within a DP system are avoided through
The provision of redundancy
The supply of additional capacity
The implementation of reliability.
The allocation of backup systems
24
The possibility of loss of Position and/or Heading is reduced by
Casual and informal operational arrangements
Efficient and comprehensive operational planning
Disorganized and limited operational planning
Ineffective and superficial operational guidelines
25
Tunnel thrusters may become ineffective:
At vessel speeds above 2 knots
At vessel speeds above 4 knots
At vessel speeds above 1 knots
At vessel speeds above 3 knots
26
Examples of Positioning Reference Systems (PRS) that can use multiple targets are:
Sonar and Depth Sounder
Radar and AIS
Gyrocompass and Magnetic Compass
Fanbeam and Radius
27
The best placement, when possible, of hydro acoustic system transponders or beacons will be:
Upwind and up-current from vessel location.
Directly below the vessel location.
In the opposite direction of the vessel’s heading.
Downwind and down-current from vessel location.
28
A DP vessel should, according to the IMO Equipment Class rules, have Power Management of the power system in the follo
DP Class 1 and 2
DP Class 2 and 3
DP Class 4 and 5
DP Class 3 and 4
29
When the DP system is in full automatic control of the vessel, the DP current is:
Determined from the statistical median
Determined from the mathematical mode
Determined from the mathematical average
Determined from the geometric mean
30
The DP current is determined by:
Measurement using physical instruments
Estimation using visual observations
Calculation using the mathematical model
Assessment based on historical data
31
The online Consequence Analysis function is a requirement in vessels of
Equipment Classes 1 and 2
Equipment Classes 4 and 5
Equipment Classes 3 and 4
Equipment Classes 2 and 3
32
When using the Global Positioning System, what is the minimum recommended number of satellites required for DP position
6
14
8
4
33
The “Weathervane” or “Auto Heading Select” facility is an essential function in which type of the operations?
Offtake tanker operations.
Cargo loading operations for container ships
Passenger boarding operations for cruise
Maintenance operations for offshore drilling rigs
34
What is required to enable auto-heading control while in Joystick mode?
Depth sounder input
Gyrocompass input
Temperature sensor input
Radar input
35
What has a major negative effect on sound propagation in water when using an Hydroacoustic Position Reference system?
Hull creaking
Thruster noise
Engine hum
Propeller vibration
36
Details of the vessel’s DP system redundancy arrangements are contained in:
The vessel's Fault Modes and Evaluation Analysis (FMEA) report
The vessel's Failure Modes and Effects Analysis (FMEA) document
The vessel's Fault Management and Effects Audit (FMEA) file
The vessel's Failure Methods and Impact Assessment (FMIA) document
37
When deploying an ROV directly over the side of a DP vessel, which of the following would be of most concern?
Proximity of ROV and umbilical to running thrusters.
Orientation of ROV and umbilical relative to navigational lights
Location of ROV and umbilical in relation to surface currents
Distance of ROV and umbilical from stationary equipment
38
Dynamic Positioning can be defined as a system which:
Manually adjusts a vessel's speed and weight exclusively by means
Remotely operates a vessel's lights and signals exclusively by means
Automatically controls a vessel's position and heading exclusively by means
Automatically monitors a vessel's fuel consumption exclusively by means
39
When using a Taut Wire positioning system, which of the following factors are significant?
The clump weight position must be accurately determined
The clump weight position is optional for operational efficiency.
The clump weight position can be roughly estimated without precision
The clump weight position can be ignored in stable conditions.
40
What is a Capability Diagram?
A tool for estimating the position-keeping capability of the ship
A system for assessing the ship's cargo capacity
A mechanism for monitoring the ship's speed
A device for measuring the ship's fuel efficiency
41
What is required to enable auto-heading control while in Joystick mode?
GPS input
Barometer input
Anemometer input
Gyrocompass input.
42
Which of the following is NOT considered as a local reference system?
Static GPS
Assisted GPS (A-GPS)
Dynamic Positioning GPS
Differential GPS
43
In a diesel-electric vessel, redundancy of thrusters and propulsion units is provided:
By having thruster and propulsion motors powered from independen switchboar
By connecting all motors to a single power source.
By operating the thrusters manually at all times.
By using a centralized control panel for all systems.
44
How are HPR beacons deployed from a DP vessel?
None of the above methods may be utilized.
Most of the above methods are not applicable.
Any of the above methods may be used.
Only specific methods may be considered.
45
What is the expected accuracy of DGPS using commercial subscription differential correction?
Less than 1/2 meter.
Less than 1.5 meters.
Less than 1 meter.
Less than 2 meters.
46
When using a Taut Wire positioning system, which of the following factors are significant?
The clump weight position can be estimated using rough calculations.
The clump weight position must be accurately determined
The clump weight position is irrelevant to the operation.
The clump weight position may be approximated based on past data.
47
What is the maximum practicable range of the Artemis system when in use as a Position Reference System for DP operations
7.5 km
5.5 km
10 km
5km
48
Which of the following are sensors that may be used in a DP system?
Altimeter
Gyro compass.
Barometer
Magnetic compass
49
What information found on a DP system would a DPO use to determine the best heading to take to minimize power consumpt
Wave/DP height and frequency
Tide/DP water level and flow rate
Wind/DP temperature and pressure
Wind/DP current speed and direction.
50
The wind sensor is an important sensor because?
It sends "feedback" information indirectly to the observer, enhancing clari
It provides "real-time" information to the operator, delaying processing
It transmits "backward" information to the system, reducing response time
It sends ''feed forward'' information directly tothe controller, bypassin
51
A DP system is considered to have 'redundancy' when the vessel has:
The skill to keep a fixed location and bearing before reaching a point
The capability to hold position and orientation after multiple points
"The ability to maintain direction and speed following a specific point."
The ability to maintain position and heading subsequent to a single point
52
The quality of positioning using DGPS can vary. Which of the following list is NOT a DGPS quality factor?
Clear and calm weather
Sunny and dry conditions
Mild temperatures and light breezes
Adverse weather conditions
53
A floating vessel has six degrees of freedom, three of which can be controlled by a Dynamic Positioning system. One of
Roll
Pitch
Heave
Yaw
54
What does the DP System use to calculate weighting (or confidence) for each Position Reference System?
Absolute accuracy of location measurements
Relative spread of fixes
Constant position of reference points
Fixed distance between navigation points
55
Which of the following principles does the GPS to determinate vessel position?
The GPS acquires signals from underwater beacons to calculate depth.
The GPS generates radio signals to communicate with ground stations.
The GPS acquires radio signal from satellites, determines multiple ranges
The GPS measures speed by analyzing signals from nearby vessels.
56
Ultrashort base line acoustic positioning is determined by:
Comparison of noise levels between different frequency bands.
Analysis of the direct signal from multiple transducers.
Evaluation of the response time of a single element in isolation
Comparision the reply signal between elements in a single transducer
57
In the Universal Transverse Mercator (UTM) co-ordinate system, why are false eastings applied?
To reduce the efficiency of calculations
To avoid negative numbers.
To maintain a constant output regardless of input
To increase the likelihood of errors
58
The Uninterruptible Power Supply (UPS) provides a backup power supply for:
DP processors, consoles, displays and reference systems
Manual controls, analog gauges, and traditional navigation charts.
Automated steering systems, simple alarms, and non-digital displays.
Basic electronic systems, handheld devices, and offline reference materials
59
Which one of the following degrees of freedom is monitored (but NOT controlled) by the DP system?
Heave
Sway
Pitch
Yaw
60
The thrusters on a DP vessel must provide control of:
Ascend, descend, and rotate.
Pitch, roll, and heave.
Forward, backward, and lateral.
Surge, sway and yaw.
61
Which element is used by the DPO to send and receive data and is they location of all control input?
DP Monitoring Hub
DP Control Station
DP Navigation Desk
DP Operator Station.
62
Under which of the following conditions may positioning be improved by increasing 'Control Gain'?
When navigating through shallow waters
When entering a harbor
When the vessel is at anchor
When encountering increased wind or current conditions.
63
Why is it necessary for a vessel to be in Auto Position mode for a minimum of 30 minutes before starting work?
To enable manual adjustments to the vessel's speed.
To allow the system's mathematical model to build
To ensure the model relies solely on visual inputs.
To prevent the system from making automatic calculations.
64
The thrusters in a DP-capable vessel may become ineffective:
When another vessel is navigating in open waters.
When another vessel is operating in very close proximity
When another vessel is anchored far away.
When another vessel is docking at a distant port.
65
The function of DP system Redundancy is to:
Prevent any equipment failure from leading to vessel drift
Ensure that a catastrophic failure does not result in a vessel drift-off.
Ensure that a minor malfunction does not cause a vessel drift-off
Ensure that a catastrophic failure causes the vessel to remain stationary
66
Which of the following is NOT true with reference to Azimuth Thrusters?
Are less complex than other thruster types
Require advanced technology and extensive training.
Are more intricate than other thruster types.
Involve complicated maintenance procedures.
67
The Sway is determined from data from:
Communication systems
Position Reference systems
Cargo Management systems
Navigation Safety systems
68
Which of the '6 degrees of freedom' for movements of a ship are controlled by the DP system?
Yaw, Surch, Roll
Sway, Yaw, Roll
Sway, Yaw and Surge.
Roll, Pich, Heave
69
A vessel is preparing to commence DP operations in shallow water. A number of additional considerations arise.
Hydro acoustic Position references have reduced vertical accuracy in deep
Hydro acoustic Position references have decreased sensitivity in calm condi
Hydro acoustic Position references have increasedhorizontal range in shall
Hydro acoustic Position references have limited effectiveness in rough seas
70
During ROV operations, which of the DP Position Reference Systems could the ROV interact and possibly interfere with?
Sonar & Acoustic Buoys
HPR & Tautwire
GPS & Radar
Magnetometer & Depth Sounder
71
Which of the following statements is correct with respect to a vessel under Auto-DP control?
The DPO can use the DP system to monitor fuel consumption in real-time
The DPO can use the DP system to achieve automatic change of position or
The DPO can use the DP system to calculate optimal sailing routes
The DPO can use the DP system to manually adjust the vessel’s engine power
72
What has a major negative effect on sound propagation in water when using an Hydroacoustic Position Reference system?
Cooling system sound
Battery charging hum
Steering noise
Thruster noise
73
What is the main purpose of Dynamic Positioning?
To allow a vessel to drift freely with currents and winds by force
To enable a vessel to navigate at high speeds and change course by hand
To allow a vessel to maintain a fixed position and heading exclusively by m
To permit a vessel to adjust its cargo weight and balance manually
74
One of the main functions of the Power Management System is:
Ensure sufficient power available at all times.
Provide power only during peak operational hours.
Ensure minimal power is available for safety measures.
Limit power availability to reduce operational costs.
75
The ''Autotrack'' or ''Track Follow'' facility on a DP system may be utilized for:
Operations involving surface vessel maintenance tasks
Operations involving aerial drone inspections of offshore platforms
Operations involving underwater welding and repairs
Operations involving ROV sea-floor surveys
76
Which component is the more important part of a DP system?
The Gyroscope
The Magnetic Compass
The Gyrocompass.
The Gravimeter
77
Under which DP vessel Equipment Class is it possible that loss of position may occur in the event of a single fault?
Class 1.
Class 0.
Class 2.
Class 3.
78
Thruster malfunction may best be detected by observing which of the following?
Thruster type and fuel consumption rates.
Thruster efficiency and operational costs.
Thruster demand and feedback data.
Thruster location and structural integrity.
79
A Thruster Bias mode can be selected:
When azimuth thrusters remain stationary in calm conditions
When azimuth thrusters continuously hunt for direction in low environmental
When azimuth thrusters operate at full power in stormy weather
When azimuth thrusters are locked in place during high currents
80
In the Universal Transverse Mercator (UTM) system, how many Zones are there?
120
60
90
30
81
What is the purpose of the 'Wind Feed Forward' facility?
Measuring slow changes in wind direction and adjusting the sail angle
Monitoring wave heights and modifying the hull's position
Detecting rapid changes in wind force and providing an immediate opposing
Tracking temperature fluctuations and adjusting the vessel's speed
82
Under which of the following conditions may positioning be improved by increasing ''Control Gain''?
When sailing in calm seas
When encountering increased wind or current conditions.
When the vessel is in dry dock
When the weather is clear and stable
83
When planning a DP operation, it is essential that:
A full hazard-identification and risk assessment be conducted
A brief checklist of hazards be reviewed
A basic safety inspection and overview be performed
An informal discussion about potential risks be held
84
What is a vessel model?
A list of the materials used to build the vessel
An operational manual of how to steer the vessel
A graphical representation of the vessel's shape and size
A mathematical description of how the vessel reacts to the forces acting
85
What would be a disadvantage of a DP system over anchored vessel control?
Intermittently operating thrusters are beneficial for divers and ROVs
Occasionally powered thrusters pose no risks to divers and ROVs
Continually running thrusters are hazards for divers and ROVs
Intermittently operating thrusters are beneficial for divers and ROVs
86
IMO Equipment Classes are defined by:
Their worst-case failure modes
Their minor failure scenarios
Their least severe failure conditions
Their most common failure modes
87
In a Hydroacoustic Position Reference System (HPR) a Responder is a device which
Is interrogated by electrical signal through cable, replying through-water
Is powered by solar energy and communicates through air.
Is activated by a wireless signal and responds via satellite.
Is triggered by physical movement and transmits data via radio waves.
88
What is the meaning of DARPS?
Standard GPS and Local Positioning System
Satellite-Based Augmentation System and Land-Based Positioning System
Differential Absolute and Relative Position System
Inertial Navigation System and Visual Positioning System
89
Which Position Reference System provides the DP system with a global position(Latitude and Longitude or UTM co-ordinat
SGPS
DGPS
RTK
AGPS
90
Performance of anHPRsystem is often limited by acoustic conditions in the water.What would be an example of such a condi
Vibrations from the vessel's hull.
Noise from vessel thrusters.
Silence from underwater sensors
Echoes from nearby marine life
91
A local Positioning Reference System is measuring from a local Reference Origin. Examples are:
AIS, Weather buoy, Chart plotter, and VHF radio
Echo sounder, GPS, Radar, and Sonar
Artemis, Taut wire, Radius and Fanbeam
Magnetometer, Gyrocompass, Depth sensor, and Anemometer
92
When conducting diving operations from a vessel on DP, the lengths of the divers' umbilicals must be:
No greater than 5m less than the distance of the nearest thruster from the
No greater than 2m less than the distance of the nearest thruster from the
No greater than 4m less than the distance of the nearest thruster from the
No greater than 3m less than the distance of the nearest thruster from the
93
Which of the following must the DP Operator communicate to ROV Control?
Position of safety lines and deck equipment
Position of buoy lines and anchor chains
Position of taut wires and other down-lines
Position of mooring lines and cargo nets
94
What is a Fanbeam or Cyscan system?
A sonar-based depth measurement system
A laser-based position reference system
A radar-based navigation system
A magnetic field positioning system
95
A vessel has a DP classification indicating that she complies with IMO Equipment Class 1. This means:
That position and/or heading is guaranteed even after a single failure
That position and/or heading may be lost as a result of a single failure.
That position and/or heading may remain stable despite a single failure
That only heading may be lost due to multiple failures
96
How does the DP system determine the target's bearing when using Fanbeam?
By tracking the vessel's speed and adjusting the course.
By calculating the distance traveled and ignoring external factors.
By observing the absolute position and subtracting the vessel's speed
By monitoring the relative bearing and adding thevessel's heading.
97
A vessel is equipped and certificated to IMO Equipment Class 2. Which of the following is a requirement?
Two gyro compasses.
Four gyro compasses.
Three gyro compasses.
Five gyro compasses.
98
A DP mode which allows a vessel to automatically follow an ROV is called:
Follow - Target
Follow-target or Follow-Sub.
Follow Targe - Sub
Follow - Sub
99
A DP-capable vessel is equipped with twin po units at the stern for DP maneuvering and for transit propulsion. Units are
Variable-pitch propellers operated at a single fixed angle.
Fixed-pitch propellers driven at variable rpm with full 360 degrees azimuth
Fixed-pitch propellers driven at constant rpm without azimuth capability.
Controllable-pitch propellers with limited rotation capability.
100
Multipath reception can be a problem for both acoustic and satellite position sensing by
Confusing the distance and direction from the source through signal reflect
Clarifying the distance and direction to the source using direct measuremen
Measuring the speed and angle of approach without considering reflection.
Determining the position of the source by analyzing temperature changes.
