Sphenoid bone - internal view There are four main parts to the sphenoid bone: the body (corpus), the lesser and greater wings (alae minores et majores) and the pterygoid processes. The body is the most centrally positioned portion. Anteriorly it contributes to the nasal cavity, laterally it builds the medial wall of the optic canal.
The anchor you chose will depend on the type of anchoring you do. Cruising anchors are larger plow or claw anchors capable of holding boats to various bottoms. Kedging, Forfjord and Workboat anchors are used on commercial vessels.
What anchor for 30' pontoon boat? What anchor for 30' pontoon boat? I have a 30' pontoon boat (with top deck - so extra wind surface blows side walls of boat). I use the boat in Lake Chickamauga which is on the Tennessee River by Chattanooga TN. I think the bottom is mostly mud/dirt.