Abstract: A reinforced fabric panel is provided with a peripheral sheath in which a resilient, thin-walled inflatable tube is deployed. When inflated the tube confined in the peripheral sheath erects from a folded state and then stretches the panel to its full plan dimensions to display an emergency message that may be illuminated by a set of strobe lights attachable to the panel edges. The stretched panel is useful as a signaling placard both on land and on the sea surface, restrained against wind either by locally found objects or by the ballast weight of the water that is trapped in the sheath.