When you’re away from shorepower, a 12-volt dinghy pump can be very useful. During our recent evaluation of marine tenders and dinghies, we used four different 12-volt inflators to pump up the rigid inflatables being tested. Practical Sailor looked at the pumps’ speed, efficiency, noise, and volume of pumps while running, along with each pump’s nozzles and adaptors, warranty, and price. The four pumps tested were the Metro Magic Air, Rule ID20, Scoprega Bravo 12, and West Marine’s 12-volt inflator/deflator. …