Naval architect Robert Allan Ltd. is one of the main players in the global tug industry, designing around 100 vessels built around the world each year. Project manager Allan Turner joins the Cat Power Podcast to talk about how today’s emissions standards - U.S. EPA Tier 4 Final - have affected tug design and how his company worked with Caterpillar to make sure the selective catalytic reduction (SCR) system didn’t impact performance or fuel economy. He also weighs in on what’s next for tugs in a reduced-carbon environment.