2015 SeaArk 1648MV, Standard Features3 All-Welded MV HullBone, OD Green, Sharkskin or Tan PaintBow DeckRear Bench SeatFloored Area for Battery/Fuel Tank Not your typical Jon Boat. SeaArk Jons are constructed of .100 gauge marine grade aluminum and use 1-piece extruded ribs for strength. With a 3/16 inch keel and no wood in the transom, SeaArk Jons are the toughest boats on the market.