COLUMBIA CLASS
The Capilano Maritime-designed Ship Docking Tugs of the Columbia Class range from 24 to 32 meters in length and are designed to utilize Z-Drive thrusters as propulsion. These thrusters supply from 60 to 90 Tonnes of bollard thrust that is applied safely through heavy cylindrical fendering to the ocean vessels hull. Generally they are outfitted as day boats and are operated by a crew of two or three.