Ship hull-to-mounted electronic device (2) it is provided. Hull-mounted electronic device is attached to the hull 20 of the ship so that the appropriate and, sheet through-hole of the sheet is aligned with the through-hole 12 of the hull to be attached to the sheet 10 having the through-holes 11 It can be. Hull-to-mount electronic device comprises a housing 14 provided with a suitable transducer, and sealing the transducer, and the lower 3 and the flange portion (4) to produce a signal that is transmitted outside of the hull with water. And the lower flange portion and at least the lower most portion is located closer to the water tightness of and is covered by the surface 5 to the transmitting material (17) for the signal produced by the transducer. A portion of the surface forms a window 13 in the housing is arranged to transmit the signal of the transducer.