A stratos 201 Pro XL CAN stay fully afloat all day w/o a drain plug in it.....or at least mine can. I did an 8 hr tourney w/o it screwed in at all...just hanging and left the bilge on auto (It ran about 10 secs every 5 mins). Never had a single issue, not like another boat I had that almost sank when this happened (both times dealer removed, I NEVER remove a drain plug......NEVER EVER).
Kudos to Stratos for the bilge set up on these boats!