The Pentagon has just released film of new aerial minesweeping devices which will be used to clear mines from Haiphong and other sealed harbours of North Vietnam.
SV Mark 106 minesweeping device
CUs showing mechanical movement detecting arms (3 shots)
SV Helicopter approaching
CU Naval officer
CU Helicopter hovering
MV Mark IDE lifted off ship
SV Helicopter tows Mark 106 hydrofoil
SV INT. Helicopter to hydrofoil being towed
MV Hydrofoil through water
CU Mark 103 minesweeping
SV Equipment being lowered from helicopter
CU PAN..Helicopter towing equipment
Initials ES. 1445 ES. 1502
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Background: The Pentagon has just released film of new aerial minesweeping devices which will be used to clear mines from Haiphong and other sealed harbours of North Vietnam.
The Mark 106 device, toward through the water by helicopter, imitates the sound made by a moving ship to detonate acoustic mines. It can also detonate magnetic mines.
Another device, the Mark 103, severs cables on moored mines.
The United States and North Vietnam have agreed on the first states of the minesweeping operation which was part of the ceasefire agreement.
Haiphong and other North Vietnamese ports have been sealed by mines since last May.
SYNOPSIS: The Pentagon has just released film of new aerial mine-sweeping devices which will be used to clear Haiphong harbour in North Vietnam of mines. The Mark 106 mine-sweeping device imitates the sound made by a moving ship which detonates acoustic mines. The hydrofoil, which can also detonate magnetic sensitive mines, is towed through the water by helicopter. The mines were laid 14th May by the United States to prevent supplies reaching Haiphong and other ports. New the Americana and the North Vietnamese have agreed on the first stage of the mine-sweeping operation.
The device was filmed during tests in 1971.
The Mark 103 uses mechanical sweep equipment to cut the cables on moored mines. The mines float to the surface and are detonated by gunfire.
Crews have been training in the Philippines since October. Now, up to 25 ships and 40 helicopters are assembling for the long delicate task of clearing the harbours for shipping again.