9. ROUTES
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9.8 Route Optimization
9.8.1 Available route optimization strategies
After all waypoints are inserted, the route is optimized from the [Optimize] page in the
[Route Plan] dialog box. If no optimization strategy is chosen, the optimization is done
with "max. speed," defined in ship parameters. Optimization calculates all parameters
for route steering (course and distance between two waypoints, maneuvering start
point, WOP, etc.). There are four methods for optimization:
Max speed: This calculation uses the maximum speed defined in the ship parameters
and multiplies by all reduction factors (weather, ice, fouling, etc.) together with speed
limits given for each waypoint to generate ETA. ETA may be entered, however it is
calculated with user-entered ETD and speed limit.
Time table: Calculates the speed required in order to arrive at destination at required
ETA. Maximum speed is never exceeded. The user enters ETD and ETA to calculate
speed to use. If, the user-entered ETA is earlier than that found with the Max. Speed
calculation, the Max. speed-calculated ETA will be indicated below the Time Table
ETA calculation figure. The calculated speed is shown on the [Route Information] box
as [Plan Speed].
Max. profit: Based on ETD, this calculation takes in account the fuel cost and the
fixed cost of the ship and calculates the most profitable speed (highest profit per time
unit).
Min. cost: Based on ETD, this calculation takes in account the fuel cost and the fixed
cost of the ship and calculates the speed that gives the minimum total cost. You need
to set Cost parameters beforehand to use this feature.
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