When our boat was surveyed when we bought her just over a year ago the surveyor noted in his report that she had two pairs of anodes, one pair fore and one aft, and that they were 30% eroded. He said that this was satisfactory, but recommended that on a boat of the length of ours - 55ft - there should be another pair fitted, and recommended that these should be added at the next haul out.
My son thinks we don't really need the extra pair, and that the surveyor may have suggested them because he is a Marine surveyor and is more used to surveying sea-going vessels. Which of them is right? And if we do need them, where exactly should the the extra pair fitted?
Thanks.