KNOWLEDGE TESTING

Do you consider yourself a DP expert? Try the test below and find out.

To promote a better understanding of all aspects of Dynamic Positioning, Ivar Storvik, Chair of The Knowledge Testing Committee and his committee has developed the following knowledge test

You can either take the test as an online test below, or print out the full test by clicking here. For answers to the test, click here

Select the answer you think is correct form the answer box and hit submit to check whether your are correct. (Note: There are 69 questions in total).

1 What is the main purpose of Dynamic Positioning?
A   To leave the positioning of the vessel to the computers in order that the operators on the bridge can be relieved of tedious work and focus on more important bridge responsibilities
B   To increase the accuracy of positioning
C   To increase operational safety

2 There are six degrees of freedom on a vessel afloat, three of which can be controlled by a Dynamic Positioning system. One of these three does not depend on the input of a position reference system. Which is it?
A   Surge
B   Sway
C   Yaw

3 What is the purpose of a Vertical Reference Sensor?
A   To measure the GPS antenna height
B   To measure the vessel displacement
C   To measure the pitch, roll (and heave) motions of the vessel

4 What single component is the most essential part of a DP system?
A   Navigation radar system
B   Wind sensor
C   The compass

5 What is the nominal accuracy of a modern DGPS system?
A   Less than 0.1 meters
B   Less than 1 meters
C   Less than 10 meters

6 What has a major negative effect on sound propagation in water when using an Acoustic Position Reference system?
A   Seabed topography
B   Water pressure
C   Thruster activity

7 When making a move under DP control it is recommended to make the move at a low speed. What is the main reason for this?
A   The position reference systems' filtering process is not able to cope at high speeds
B   The wind sensor will add the vessel speed to the true wind speed, thus giving an erroneous wind force
C   The reduction in transverse thruster efficiency creating a risk of losing heading control

8 When is it advisable to deselect the wind sensor?
A   When a helicopter is about to land on your vessel.
B   When moving from one position to another under DP control
C   When thunderstorms are in the vicinity

9 What is the main advantage of a triple redundant DP system?
A   Up to 3 DP operators may operate the DP system simultaneously
B   A dramatic increase in the Mean Time Between Failure (MTBF) rating.
C   You may leave one or two system(s) switched OFF, thus avoiding unnecessary wear and tear.

10 What is a Fanbeam system?
A   A microwave positioning reference system
B   An ultrasonic positioning reference system
C   A Laser positioning system

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