Hi Mark,
The strut on the spinnaker pole extends downward from the spin pole which is about at deck level at pole mid point. It is very close to a Dolphin striker, just not quite as deep. It could encounter/strike a fish or Dolphin.
The Pelican striker extends up from the spinnaker pole to the intersection of the forestay bridle wires. It could possibly encounter/stricke a bird or Pelican.
A litle corney but maybe it makes sense.
Bill