NAUTILUS TC5 BUDDY – MF4 Magnetic Field Antenna

The Buddy MF4 Magnetic Field Antenna has been designed to generate a magnetic field in the shape of a sphere or an ellipse around the antenna. The Operator’s Unit detects and measures the strength of this field.

The Operator’s Unit has 3 field strength detectors built into it. Each one detects the magnetic field in a different plane (x, y, and z). This ensures that regardless of the attitude of the operator, the operator’s unit will detect the field and measure it as accurately as possible whether the operator is standing, kneeling or lying down. Also, the operator will be detected even if the vehicle is extremely large and it’s bulk prevents a direct line of sight between the two MF4 Antennas and the operator’s unit











Even for complex and long distance applications such as underground Continuous Coal Miners, two tiny MF4 Antennas are able to generate a magnetic field around even the biggest vehicle.














The MF4 has two layers of protection. The first is that all of the components inside the box are immersed in a liquid which hardens into a solid block. This ensures excellent protection against vibration and shock.

The second layer of protection is provided by the high quality Swiss underwater-rated connector which is extremely corrosion resistant and has gold plated contacts.

The entire MF4 Antenna can be dropped into a deep pool of water and retrieved without any adverse effects.

Note that Nautilus has simplified the MF4 connector and cable, only two wires (simple twisted pair of wires) are needed now instead of the previous dual-coaxial cables.


Antenna: 6.2” x 3.5” x 1.4” (157mm x 89mm x 36mm)

Stainless steel plate: 2.75″ x 2.2″ x 0.13″ (70mm x 56mm x 3.3mm)

Weight: 2.25lb (1.02kg)

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