On the cover: Like fireworks, an arc occurs during ignition of the two torches used for parallel welding on a 12m (39.4') aluminum workboat built by Ophardt Maritim in Duisburg, Germany. Story on page 22.Photograph Alexandra Harin/Ophardt Maritim
FEATURESRobotopia: by Dieter Loibner Ophardt Maritim, a German builder of aluminum boats, bets on robotic welding for improved quality and production efficiency. Emergency Rudder Repairs en Espanol, Part 1: by Nigel Calder Making an unexpected repair overseas, a marine professional manages his own project in less-than-ideal working conditions and a tight timeline. CAN Bus at Sea, Part 1: by Richard T. McLaughlin and Chris Quigley. A technical review of CAN bus technology and a diagnostic case study of some faulty networked onboard systems. Manuals in the Cloud: by Kelly Vaughn For component documentation and technical information about the installation and maintenance of onboard systems, make the simple move to Dropbox. Letters, Etc. Readers comment on overcurrent protection on every battery; hidden costs of 3D-printed tooling; and the long-term impact of bad design.Rovings : compiled by Dan Spurr The Petestep hullform; Jensen's disappears from Seattle waterfront; new abrasives from Festool; vacuum-bagging at IBEX; getting the pink out of upholstery; High Strain Dynamics; and SAY sets electric boat record.Parting Shot: by George Robson An engineer for high-speed boat experts Norson Design Works turns to automotive and aerospace designers to develop custom CFD software for marine applications.