BOATsmart! Canada
Knowledge Base

What is a lock?

A lock is a confined section of canal with a structure of gates which open and close, allowing water levels to be adjusted within the canal. This enables boats to travel between stretches of water that are different elevations.

How does a lock work?

The lock gates open, allowing boats to enter the lock. Once the gates are closed, the water level within the lock is increased or decreased to match the water level of the adjoining waterway. Once the water level is correct, the gates are opened to allow boats to travel into the next waterway.

Note: Certain activities including swimming, fishing, and waterskiing may be restricted around locks.

Speed restrictions signs are usually found at lock entrances- be sure to operate with extra caution and control your speed when in the vicinity of a lock.

When approaching a lock you should:

• Adjust your speed for water currents and other boat traffic
• Operate according to any posted navigational aids (markers and buoys)
• Adjust for adverse weather conditions, such as high wind
• Be prepared for oncoming traffic such as boats exiting the lock