they measure time on a boat with a chronometer
The time signature of the song "Row, Row, Row Your Boat" is typically 4/4, meaning there are 4 beats in each measure.
yard
To work that out you measure the distance traveled and divide it by the time taken.
The same way you would measure ANY angle.
A magnetic compass can measure a boat's heading, or the direction it is moving.A compass
That depends what you want to measure - its length, its mass, its color, etc.
from the base to the tip.
The best time to buy a boat is in the winter.
To measure time. To measure time. To measure time.
There is not one particularly good time to buy a used boat. It would be smartest to buy a used boat when it is on sale and when you have the budget to buy the boat you want.
use a metre stick
You can do so in any unit but in backward countries people talk of boat lengths in feet because they use the imperial system. More properly they should use the international standard unit of length which which the meter and would be understood worldwide.