Speed Curve

Image of Speed Curve to work out boat speed in knots.
Speed Curve

Use this Speed Curve to get the children involved and interested. You can work out your speed in knots by timing an object for a known distance such as your boat length.

You can either wait until you sail past a suitable object such as a patch of seaweed, or toss something like an apple core ahead of the bow.

As with timing lights at night, I find that ‘I reckon that’s One Thousand, I reckon that’s two thousand etc…’ pretty much as fast as you can say it works well. Get your watch out and give it a try!

Below is a Free pdf for you to download your own copy.

Why not have a look at our instructional pages such as this one on Tidal Streams or our popular Cockpit Cards.