Have a question about the mast height on an S37. Book says 48.6, but went under the bridges in Cape May, which are listed at 50. Went under at low tide, and the bridge markings showed about 55 or 56 feet. Drug the antenna, on both of them, so I was pretty close. The antenna is a 3 footer. Question is, did Seidelman make a tall rig that I don't know about, or has my mast been changed. PO knows nothing about it, and thinks it is 48.6. There is a strip or stripe around the mast about two or two and a half feet down from the top, but I can't tell whether or not it is an extension. Anyone know what is going on with this, or how I can find out.