The critical questions to ask when planning your trip are: 在计划航⾏时,需要考虑的⼀些关键问题:
• When does the tide change direction? • 潮汐何时会改变⽅向?
• How much flow is there in which direction?
• 潮流强度以及流向如何? •
Is there sufficient depth for a safe course? • ⽔深是否⾜够确保安全航⾏?
Times and heights of high and low water can be found in a nautical almanac. Local tide tables available from yacht chandlers, sailing clubs or the harbourmaster’s office, or numerous smartphone apps provide all you need to know for local sailing.