Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 4818 JANUARY/FEBRUARY 2017 • FOGHORN TECHNOLOGY Certified interior and exterior seating and accessories for any commercial vessel • Passenger seats • Interior benches • Exterior benches • Fold up seat • Helm seat • Bar stool •Tub chair •Tables • Full range of accessories Certified interior and exterior seating and accessories for any commercial vessel • Passenger seats • Interior benches • Exterior benches • Fold up seat • Helm seat • Bar stool •Tub chair •Tables • Full range of accessories Introduction Battery-powered vessels are a reality and offer some major advantages over internal combus- tion engine driven systems. While the obvious advantage in the public’s perception is the elimination of emissions, these systems also offer significantly reduced operating costs and construction costs comparable to a traditional vessel. This is primarily due to the high efficiency of electrical motors and drives, and the elimination of significant costs and mainte- nance associated with engines and their supporting systems. These systems are particularly suitable for vessels that have well-defined routes and operate at displacement speeds. This would include vehicle ferries, passenger ferries, excursion and dinner vessels. Of particular note on these vessels is what is missing from the picture. Note the absence of the engines, generators, and Battery-Powered Vessels reduction gears; mufflers and exhaust systems; fuel oil tanks, piping, pumps and filters; lube oil tanks, piping, pumps and filters, engine cooling pumps, piping and heat exchang- ers; engine and generator starting systems. All of these are a tremendous maintenance burden with a cost that cannot be ignored. There are also no Class-A machinery spaces, so many fire-rated bulkheads are eliminated or down-graded. System Description On page 20 is a diagram of the main propulsion and power systems for a typical battery-powered vessel. Given Understanding System Operation, Components and Costs By Joseph Payne, PE, EESImarine