WorksheetsNav 7 SEMI FINAL QUIZ 1 1671
Total questions: 20
Worksheet time: 10mins
What does the term 'safety contour' represent?
The maximum vessel speed allowed in a specific area
The predetermined depth separating safe and unsafe waters
The clearance between the vessel’s keel and seabed
The vessel’s static draft limit
What factor contributes to the squat effect during navigation?
Use of modern navigation systems
Speed of the vessel
Position of the safety contour
Height of the tide
Which formula is used to calculate squat in confined waters?
Squat = Depth − Static Draft
Squat = 2 × (Cb × V² / 100)
Squat = Cb × V / 50
Squat = Speed × Draft × Tide
What is Under Keel Clearance (UKC)?
The additional clearance between the safety contour and safety depth
The minimum clearance available between the ship's keel and seabed
The margin of error during navigation planning
The vessel’s effective draft
What additional parameter does the effective draft include?
Cargo weight
Weather allowance
Vessel’s length overall
Speed factor
Which contour is displayed on ECDIS to separate safe waters from shallow ones?
Shallow contour
Deep contour
Safety contour
Dynamic contour
What is the significance of maintaining safety depth?
To minimize fuel consumption
To ensure adequate clearance in challenging conditions
To prevent crew fatigue
To maximize vessel speed
Which factor does not affect squat?
Channel width
Water depth
Type of cargo onboard
Speed of the vessel
What is the primary purpose of shallow contour settings?
To track vessel traffic density
To alert navigators of potential hazards in shallow waters
To maximize vessel maneuverability
To calculate tidal changes
How is 'Exceeds Minimum UKC Required' calculated?
Resulting UKC × Minimum Required UKC
Resulting UKC − Minimum Required UKC
Effective Draft − Water Depth
Static Draft × Safety Contour
Safety parameters are optional for vessels navigating in confined waters.
True
False
Squat increases with the vessel’s speed and becomes more significant in shallow waters.
True
False
Under Keel Clearance (UKC) is calculated as the tide height minus the vessel's draft.
True
False
Deep contours always represent the shallowest navigable waters for the vessel.
True
False
Effective draft accounts for factors like weather allowance and squat correction.
True
False
Maintaining adequate UKC is not required for vessels alongside conditions.
True
False
Safety contours help delineate areas where navigation may be unsafe due to depth limitations.
True
False
Squat effect is irrelevant in confined waters.
True
False
Shallow contour settings on ECDIS are defined based on the vessel's draft.
True
False
Environmental considerations have no impact on safety parameters during navigation.
True
False
