Abstract: A mine countermeasure device includes a passthrough mechanism and a mine neutralization package. The passthrough mechanism includes a first wheel with a raised rim and at least one radially oriented slot or notch, a clevis member rotatably engaging the axle of the first wheel, and a bail member slidably engaging the underside of the rim. A smaller wheel is pivotably connected at its axle to an angled member extending from the neutralization package. The neutralization package also includes a collapsed float, a gas generator to inflate the float, explosives to neutralize a mine, and an electric detonator for the explosives. The passthrough device is towed underwater by a sweep wire connected to the clevis member and to the bail member. When the sweep wire encounters a mine mooring, the sweep wire is pulled along the mooring until the mooring enters a slot of the first wheel.