This ship is stealthy reinforced surface (1) comprising a shell (2), a bridge (5, 6) and of the superstructures (3), equipped with sensors and of transmitters, and possibly of handling means is characterized in that the outer casing (4) of the dead bottom is constituted by walls which are all inclined towards the inside, so that their external faces are directed towards the top with angles with respect to the vertical greater than or equal to 20° at least to the - the top of a line located 5 m at the top of the flotation line, and, at least 50% of the length of the vessel, above a line located at least one meter above the waterline and in that the lines of a generally vertical junction of two adjacent walls are inclined towards the inside with angles with respect to the vertical greater than 20°, and in that the sensors and transmitters, the arms and the handling means are hidden, or can be concealed in or on the outer envelope of the bottom dead.
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