Sailing Maths
Maths in sailing: tide times
Read tables and plan safe journey windows with adults.
Quick answer
Maths in sailing: tide times helps sailors plan safe journeys by reading tide tables and finding the best times to sail when the water is deep enough and moving in the right direction.Learning outcome
By the end of this page, you will be able to read tide tables and find safe sailing windows when the water is deep enough and the tide is moving in the right direction. Success signs:- You can read a tide table and find the times when the tide is high or low
- You can tell which times are safe for sailing based on tide depth
- You can plan a sailing trip using tide information
- You can explain why tide times matter for sailing
Why this matters
Tide times are important for sailing because the water level changes throughout the day. When the tide is high, the water is deeper, making it safer for boats to sail. When the tide is low, the water is shallower, and boats might get stuck on sand or rocks. Sailors need to know when the tide will be high or low to plan their journeys safely. It's like knowing when the swimming pool will be full or empty - you want to go when it's full!How it works
Tide tables show how the water level changes over time. Here's how to read them:- Look at the dates and times on the table
- Find the high tide times (when the water is highest)
- Find the low tide times (when the water is lowest)
- Check the water levels (measured in metres)
- Plan your sailing when the tide is high enough
Examples you can see
Let's imagine you're planning a sailing trip in a small harbour. Here's a tide table for one day:| Time | Tide Level | Type |
|---|---|---|
| 06:00 | 1.5m | Low tide |
| 12:00 | 4.2m | High tide |
| 18:00 | 1.8m | Low tide |
- At 6am, the tide is low (1.5m deep)
- At 12pm, the tide is high (4.2m deep)
- At 6pm, the tide is low again (1.8m deep)
Try it as a mini adventure
Adventure: The Sailing Challenge You're planning a sailing trip with your family. Your boat needs at least 1.5m of water to sail safely. You want to go sailing in the morning when the weather is calm. Your local harbour has these tide times:| Time | Tide Level | Type |
|---|---|---|
| 07:00 | 1.2m | Low tide |
| 13:00 | 3.8m | High tide |
| 19:00 | 1.4m | Low tide |
- 4th time: What is the water level at 10am?
- 5th time: When is the best time to sail?
- 6th time: How much water is there at 10am?
- 7th time: What is the difference between high tide and low tide?
Common mistakes
- Mistake: Thinking low tide is always safe Why it happens: Children might think shallow water is better for sailing Fix: Remember that boats need deep water to sail safely
- Mistake: Not checking the tide levels Why it happens: Kids might only look at the time and not the depth Fix: Always check both the time and the water level in the table
- Mistake: Confusing high and low tide Why it happens: The words sound similar Fix: Remember that high tide means the water is high, and low tide means the water is low
Parent and carer guide
As a parent or carer, you can help by:- Reading tide tables together and discussing the numbers
- Using a simple chart to show how the tide changes
- Practising with real tide tables from local harbours
- Discussing why sailors need to know tide times
- Encouraging children to ask questions about the patterns they see
- "Look at how the water level changes during the day"
- "When is the water deepest? When is it shallowest?"
- "Why do you think sailors plan their trips around the tide?"
- Children might make small mistakes in reading the times
- They might confuse high and low tide at first
- It's normal to need practice with reading tables
Practice questions
- What is the difference between 12:00 and 18:00 in the tide table?
- At what time is the tide lowest?
- How much water is there at 12:00?
- When is the water deepest?
- Why is it important for sailors to know tide times?
- 6 hours
- 06:00
- 4.2m
- 12:00
- Because the water level changes and boats need deep water to sail safely
FAQ
What is a tide table?
A tide table shows how the water level changes at a specific place over time. It helps sailors plan when it's safe to sail.
How do tides work?
Tides happen because the moon and sun pull on the Earth's water. This makes the water level rise and fall in a regular pattern.
Why do sailors need to know tide times?
Sailors need to know tide times to avoid getting stuck on sand or rocks when the water is too shallow. They also need to know the direction the tide is moving.
What is the difference between high and low tide?
High tide is when the water level is highest, and low tide is when the water level is lowest. The difference shows how much the water level changes.
How can I learn more about tides?
You can look at tide tables online, visit a local harbour, or use a tide calculator app. You can also make your own tide chart by observing the water level over several days.