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Re: Confusion: spinnaker, gennaker?
If you've folded the sail in half vertically and the clews line up, you do have a symmetrical spinnaker (as opposed to a gennaker/cruising chute/Asail) and the presence of a pole would back that up. If it's a proper spinnaker pole it should be the same length as the distance from your mast to your forestay (ie the "J" measurement) As such pole rings near the bow will be of little use.
If the pole is short, or telescoping, then it's not a proper 'spinnaker' pole and may be a whisker pole or a reaching strut depending (reaching strut is short and fixed length). If someone's jury rigged something to be connected to the rings on deck that's an odd situation. Those rings are usually used to store the pole when it's not being used. They are not really built to take any kind of loads as a rule.
If it's a proper pole then at least a fixed ring on the mast will be required, a ring on an adjustable track is preferred but not essential, esp if not racing.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)