WHY TIDAL MARINE? 45 Years In Business Northwest Plastics Ltd was Incorporated in 1973 in Vancouver BC. 25 Years Afloat Tidal Marine has buoys that have been in the water for over 25 years. 32 Styles & Sizes The number of standard buoys and floats Tidal Marine produces. 5 Oceans Our buoys and floats can be found in service all around the world.