```
Vboat/shore = Vboat - Vcurrent
```
where:
* Vboat/shore is the velocity of the boat relative to the shore
* Vboat is the velocity of the boat in still water
* Vcurrent is the velocity of the current
To use this equation, you will need to know the velocity of the boat in still water and the velocity of the current. You can find the velocity of the boat in still water by measuring the distance the boat travels in a given amount of time. You can find the velocity of the current by measuring the distance a floating object travels in a given amount of time.
Once you have these two values, you can simply substitute them into the equation to calculate the velocity of the boat relative to the shore.
