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15. NAV TOOLS
15-5
15.5 Predictor
The predictor is a tool for estimating your ship's future positions and behavior. The on-
screen predictor graphic consists of three pieces of your ship, drawn in true scale to
successive future positions. The position of the third symbol will be your approximate
position at the end of the time interval selected. The predictor is calculated using cur-
rent speed and rate of turn. Docking speed components (transversal bow speed,
transversal stern speed, transversal center speed and rate of turn) are assumed to be
stable during the prediction period:
• Docking speed components:
• Transversal bow speed
• Transversal stern speed
• Longitudinal center speed
• Rate of turn
These components are assumed to be stable during the prediction period.
The predictor can be used in every steering-state, including manual steering.
Movement of
predictor
(three pieces)