When should you contact the lock attendant?

Contacting the lock attendant at least 400 feet away from the lock is crucial for ensuring safe and efficient navigation through the locking process. This distance provides adequate space for the lock attendant to assess your vessel, provide you with instructions, and prepare the lock for your arrival. It allows for a clear communication channel and ensures that you are well within a safe distance to receive any instructions or signals without being in a potentially hazardous situation near the lock.

Waiting until you are too close or after entering the lock to make contact increases the risk of a collision, miscommunication, or other dangerous situations, as conditions may change rapidly as you approach. It's important to establish communication early to ensure a smooth transition through the lock and to coordinate with the attendant's workflow efficiently.