Dual rope vibration isolation module for towed hydrophone streamer

A transition unit for a vibration isolation module, comprising:

• a primary block with a substantially cylindrical cross-section and a primary block eye channel located therein, said primary block eye channel having an entry channel, an exit channel and a crossover channel coupling said entry and exit channels, said primary block eye channel entry, exit and crossover channels cooperating to form a pathway for a first tension member to terminate with an eye in said primary block;
• and
• a secondary block with a substantially cylindrical cross-section and a secondary block eye channel located therein, said secondary block eye channel having an entry channel, an exit channel and a crossover channel coupling said entry and exit channels, said secondary block eye channel entry, exit and crossover channels cooperating to form a pathway for a third tension member to terminate with an eye in said primary block, said secondary block further having a loopback channel having an entry channel, and exit channel and a crossover channel coupling said entry and exit channels, said loopback channel entry, exit and crossover channels cooperating to form a pathway for a second tension member to loop back within said secondary block.