- Type of vessel, draft and under keel clearance at various stages of the voyage.
- Time of the year and expected weather/sea conditions.
- Available depths and width of water.
- Possibility of encountering gale force winds causing subsequent delays or damage to the vessel.
- Likelihood of encountering ice and fog causing delay or deviations from the planned route.
- Predominant currents / tidal streams being either adverse or favourable to the ship’s course.
- Economical route (fuel & time saving).
- Good weather route (for passenger’s vessels).
- Recommendations from Ocean Passages of the World.
- Recommendations from Meteorological Office.
- State of loading and nature/type of cargo.
- Need of any tasks to be carried out during voyage.
- Overall navigational aids on board.
- Distances off from Islands and another navigational hazard, in case of engine failure.
- War zones, fishing traffic, oil and gas offshore developments and abnormal waves.
- Overall distance comparison
- Company’s or charterers preference.
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Very useful and thanks