If the posts don't meet the keel
then I believe that they are called Sampson posts.
"Sampson post - A strong vertical post used to support a ship's windlass
and the heel of a ship's bowsprit
"knighthead (plural knightheads)
1. A mitred backing timber which extends the after line of the rabbet in the stem to give extra support to the ends of the planks and the bowsprit.
2. A bollard or bitt.
3. Either of two timbers rising from the keel
of a sailing ship and supporting the inner end of the bowsprit."