Simple reasons:
1. A ferry can be inspected continuously - after every run, end of day, end of season, etc.
2. The sail can be in the ideal position.
3. The sail will not get damaged during the loading/unloading process.
1. A ferry can be inspected continuously - after every run, end of day, end of season, etc.
2. The sail can be in the ideal position.
3. The sail will not get damaged during the loading/unloading process.
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