Osprey ain't hovering over the deck for 90 minutes, it is busily upsetting the hippies and melting the polar bears by sitting on deck alert with engines turning and burning for some unfathomable reason!
Plane guard would be performed away from the deck to deconflict from deck and flying activities. US plane guards fly "Star-D" - esentially a race track off the starboard quarter, out of the way of recoveries, but close enough to get stuck in sharpish if required.