The Panama Canal Authority is investing in especially powerful tugs for the Post-Panamax era: 14 tractor tugs and 13 ASD tugs with SCHOTTEL propulsion systems were commissioned in the last four years. The youngest generation of 14 tractor tugs delivered by Astilleros Armon Shipyard was recently completed. One tug after another started in Spain and travelled the high seas for about a month, on their own and under their own power. They have a bollard pull of 85 tons. With a length of 28.90 meters and a width of 13.50 meters, they are a good deal larger than the ASD tugs.