Golf bags may include a main compartment for holding golf clubs and a flip pocket attached with the golf bag body but movable between an engaged position and a disengaged position. Strakes extend along an exterior of the hull, each strake comprising a gas-filled tube of a sheet of a flexible sheet material. The invention also relates to a coated wire and to a coated optical fiber. The plurality of image data frames are processed to generate a surface height map of the target region, and surface height attributes are determined for the defect.