What chemical solution is often used to de-scale a marine engine’s heat exchanger?
Send your answers to firstname.lastname@example.org. A winner will be selected randomly from the correct answers and will win a one-year subscription to the digital version of Blue Water Sailing magazine.
Congratulations to Stacey Williamson of Reston, VA who correctly answer our last Mindbender question on digital charts. She emailed: “Rater charts are simple scans of exiting paper charts with no extra information added. Vector charts are smart charts created in layers that allow the chart maker to add all kinds of information on buoys, channels, etc.”