Geo Magnetic Head
Detecting metal buried in the sediment
Possibility of towing equipment behind the SeaCat by attaching the tow cable to the strain-relief of the fibre-optic cable
The picture shows a sample data which has been recorded in the harbour of Olpenitz in the Baltic Sea.
The picture shows the SeaCat with Geo Magnetic Head before launch.
The path of the vehicle is shown as light green line; the data has been overlaid to a satellite image of the area.
It is clearly visible that the concrete dock structure increases the magnetic intensity in shape of a distributed noise. In contrast, there is a strong magnetic contact close to the end of the survey.
The picture shows The SeaCat on a Geo Magnetic survey.
The Geo Magnetic Head comes as a complete set, consisting of a SwapHead with cable intake, a towed magnetometer and a cable guidance system.
The G-882 Marine Magnetometer is particularly well suited for the detection and mapping of all sizes of ferrous objects.
- ballast stones
- other scattered shipwreck debris,
- munitions of all sizes (UXO),
- engines and any other object with magnetic expression.
Objects as small as a 5-inch-screwdriver are readily detected, provided that the sensor is close to the seafloor and within practical detection range.
|Ship 1000 tons||0.5 to 1 nT at 800 ft (244 m)||1000 lb bomb||1 to 5 nT at 100 ft (30 m)|
|Anchor 20 tons||0.8 to 1.25 nT at 400 ft (120 m)||500 lb bomb||0.5 to 5 nT at 50 ft (16 m )|
|Automobile||1 to 2 nT at 100 ft (30 m)||Grenade||0.5 to 2 nT at 10 ft (3 m )|
|Light aircraft||1 to 2 nT at 100 ft (30 m)||20 mm shell||0.5 to 2 nT at 5 ft (1.8 m)|
|Pipeline (12'')||1 to 2 nT at 200 ft (60 m)||Screwdriver (5'')||0.5 to 2 nT at 12 ft (4 m)|
|Pipeline (6'')||1 to 2 nT at 100 ft (30 m )||10 lbs of iron||0.5 to 1 nT at 20 ft (6 m)|
|100 kg of iron||1 to 2 nT at 50 ft (15 m)||1 lb of iron||0.5 to 1 nT at 10 ft (3 m)|
|100 lbs of iron||0.5 to 1 nT at 30 ft (9 m)|