Edgetech 4125 - Mechanical Interface; Figure 1-2: Edgetech Fork Coupler for Marine Magnetic Magnetometer

1-2 SECTION 1: OVERVIEW
Customers who wish to add a magnetometer to their current 4125 LT systems also need to contact
EdgeTech to have their serial number checked in order to see if the system is eligible for the upgrade.
The customer may have to send in the 4125 LT tow fish to EdgeTech if they have an older model.
If the customer is eligible for the add on option, they need to order an interface kit P/N 0016344 from
EdgeTech as well as the magnetometer manufacturer. The EdgeTech kit consists of:
• 4125 LT Mag option Fork coupler.
• Y-Cable splice to connect the existing tow cable to the side scan and magnetometer.
• All hardware needed to add coupler and interface with Universal Link (TAB)
1.1
Mechanical Interface
Typically, the magnetometer manufacturer will provide a 10m tow cable with a mechanical termination
to connect to the side scan tow arm. In turn, EdgeTech provides a custom tow point key for the
magnetometer. The tow key is attached to the side scan tow arm through a clevis pin (see Figure 1-2).
In the event that the side scan towfish hits something, the tow arm shears from the housing, the
magnetometer stays attached to the key and tow cable, and the fish is retrieved from the tail by the
Recovery cable.
The magnetometer connects to the breakaway arm using a clevis pin that allows swivel action but does
not allow the magnetometer to rotate. Since the Magnetometer is lighter than the side scan, it will tow
aft and above the side scan.
Figure 1-2: EdgeTech Fork Coupler for Marine Magnetic Magnetometer, PN 0015842
Tow Arm
SeaSPY II / Mini-
Explorer
Universal Link (TAB)
4125 MAGNETOMETER INTERFACE 0016510_REV_A