Purchase Hammerhead Inductive Modem Jumper System

[neaptide]

Found a nice solution for hardening the Inductive Coupler Cable (ICC) from Mooring Systems called the Hammerhead Inductive Modem Mooring Termination.

The system consists of:

• Wire Rope 3/8 with (1) Hammer Head, (1) Standard Termination, 20m
• Wire Rope 3/16" jumper, (1) termination and no boot, in hose, 4m
• Plastic Hammerhead Cover and Strain Relief Clamp Assembly
• IM mounting plate for ICC and WR Jumper (Customized to fit on UNC Buoy, Type 316 stainless with rubber isolation and sleeves, Mounts to buoy base flat bar using backing plate, Type 316 stainless bolts and nuts, Easy mounting to buoy during on deck operations)

The tasks that need to be completed:

• place order
• provide James at MS with dimensions of buoy cross-arm for fitting customized mounting plate
• make sure we have the right clamp size on the ICC to accommodate the 3/16" wire rope jumper
• hand delivery to Woods Hole

Remaining questions:

• Any special size link to the hammerhead termination of the wire rope? Currently, the order of linkages is buoy, (1) 7/8" chain shackle, (1) 1m shot of 3/4" chain, (1) 5/8" anchor shackle, (1) 3/4" pear link, and (1) 5/8" anchor shackle to the standard termination of the wire rope.

Here is some information I have from James at Mooring Systems:

“The hammerhead is an isolated termination from seawater that allows continuing the inductive signal through a jumper up to the underside of a surface buoy or across sub-surface buoys mid-water column. The jumper is a length of 3/16” jacketed 3x19 wire rope. When jumping up to a surface buoy, we would swage a termination fitting to function as the seawater ground. This ground would bolt to the underside of the buoy. This allows the Inductive Coupler (ICC) to also be physically mounted to the underside of the buoy. The wire rope jumper is robust and can handle more bending from buoy motion than the ICC cable, thus greater survival.

The hammerhead jumper requires an ICC to capture the signal that is part of the Seabird IMM or RBR electronics. Mooring Systems does not provides these parts.”