Leonard Vertical clearance is nice to know but if you do not know your vessel air draft how do You Know if you can get under the Vertical clearance? Nit picking? Certainly not until you break a expensive fiberglass antenna in half or Knock off a Nice anchor light Then the picking is picking up The pieces off your deck. Your experience will then be building Bob Kovach Lying Cockrell Creek Reedville VA Sent from my iPhone Chief Engineer Bob Kovach (KJ4UGE) Onboard M/Y ALLEZ! GOLD LOOPER 5-2-2016 MTOA2631, USCG-CWOA, WRCC, AGLCA-1979, USPS CHARLESTON, S.C.