Passage Planning Flashcards
You’re leaving for an Atlantic crossing from the Masters view point
• 5 C’s
The vessel needs to be seaworthy
• Compliance.
• Certification.
• Condition.
• Crew.
• Conduct.
How would you expect the new second officer to do a passage plan?
He will need to know your preferences - to enable him to do this you will produce your
standing orders
Margins of safety
Before tracks are marked on the chart, the clearing distance from the no-go areas needs to be considered. A safety margin is required around the no-go areas at a distance that, if you had an issue you would not stand into danger before corrective action can take place. Factors for Margin of Safety are:
• Reliability of the chart survey.
• The dimension of the ship.
• The accuracy of the navigational systems to be used. • Accuracy of echo sounder.
• Tidal streams.
• The maneuvering characteristics of the ship.
Ships’ routeing
Ship reporting systems
• Vessel Traffic Services (VTS)
• Under Keel Clearance (UKC)
Under Keel Clearance (UKC)
When determining under keel clearance, consider these points:
• Squat of the ship due to shallow water effect and the necessity to reduce speed to decrease its effect.
• Reliability of charted depth data.
• Predicted tidal levels including if any expected negative surge.
• Areas of mobile bottom (silting/sand-waves).
• Any change in water density in passage (and its effect on draft).
• Reduced depths over pipelines and other obstructions.
Position fixing
Should be done at sufficiently frequent intervals during the watch check the vessel’s position, course and speed using all appropriate navigational aids and means necessary to ensure that the vessel follows the planned track.
Frequency of fixing should depend on the distance from navigational hazards and the time the ship would take to run into danger before the next fix. This depends mainly on the ships speed.
