I marked them with black circles. What are they for? enter image description here

Source (modified)

  • 4
    $\begingroup$ in raft mode I'd guess a place for the tent to prop itself up with $\endgroup$ Mar 28 '16 at 23:28
  • 4
    $\begingroup$ Those are where the ladies hang their hand-bags on the way down. :) $\endgroup$
    – FreeMan
    Mar 29 '16 at 17:40

@ratchet freak is correct. The protrusions are canopy poles, where the canopy in the evacuation slide/raft is propped up. The image below shows a canopy propped on them.


Image from tulmar.com

From the document:

The canopy is supported in the center in 4 places by inflatable yellow “CANOPY END SUPPORTS” and “CANOPY CENTER SUPPORTS”, and supported along the sides by 14 numbered supports on the top of the slides inflatable structure.

Here's a closeup of the support from the same document.

Canopy support

  • 6
    $\begingroup$ Has there ever been an actual event where a slide was required to be used in this way? $\endgroup$
    – woakley5
    Mar 29 '16 at 3:57
  • 3
    $\begingroup$ where is the actual canopy stored? $\endgroup$
    – Phantomazi
    Feb 8 '17 at 23:11

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