| | | What's the best water heating system 2. From there, trace a line to the left until you come to the line corresponding to the waters in which you plan to operate. 3. From there, trace a line vertically downwards until you come to the line corresponding to the season in which you plan to operate. | | my boat? 4. From there, trace a line to the right: Select the line corresponding to your type of boat in the lower section and then trace a line vertically downwards - that's the recommended system. | | |