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22 · Navigation Tasks
Voyage planning
Voyage planning is a preparation phase for coming voyage. Preparation includes route definition, route calculation
and optimisation.
Required sea charts are also prepared in voyage planning either by updating existing charts or creating new ones.
Voyage
Planning
Route
Calculation
User Chart
Planning
Route
Planning
Chart
Planning
Route Planning
Modification an existing route or creating the whole new route is the way to do Route planning.
Definition of route consists following:
· Position of each waypoint · Safe water calculation based on Safety limits
· Turning instruction for each waypoint · Required steering accuracy for individual leg
· Safety limits between waypoints (channel limits) · Speed restrictions for a leg
Information notebook:
· Information pages to alert operator at a given waypoint or in the selected area.
· Automatic and/or manual notebook function to tell operator position based information.
Voyage optimisation parameters.
Route Calculation
Route calculation for voyage planning includes following:
Route profile calculation:
· Distance between consecutive waypoints · Total distance
· Course between waypoints · Estimated time for voyage
· Calculation of wheel over point ·
Route check
· Grounding alarm based on available depth information in digital chart data base