Four winns 338 Vista Owner's Manual page 17

Ensure slings are in proper location as indicated by the sling label location. Failure to do so may result in
permanent hull structure damage and will invalidate the hull structure warranty.
SLING
No Ventilation - Do Not Store Fuel Warning Label
Shore Power Inlet Warning Label
Carbon Monoxide - Cabin Doors Warning Label
Dockside Air Conditioning Inlet Label
Carbon Monoxide - Canvas Warning Label
Microwave Caution Label
Preface Owner's Manual Page 14