January 14, 2006Company Confidential NAUTILUS ETHERNET IFS # Rev. A

Product Description Nautilus Ethernet connector harnesses have been engineered to provide a fully wet-mateable connection system for 10/100 Base-TX communication. Each Ethernet harness system consists of wet-mateable, 12-way Nautilus-style connectors, 12-way Nautilus penetrators, PBOF hose conduits and 1.5 meter pigtails with RJ45 network card connectors. Internally, the Ethernet signals are transmitted over CAT5e Ethernet cabling sealed by two independent barriers to seawater ingress. Eight pins of the 12-pin connector are soldered to the CAT5e cable for low power signal communication. The four remaining pins have twisted 14 AWG 1000 V spec 44 wire connections capable of 20 amp DC or AC power. Subsea connection of the harnesses may be accomplished by ROV, Diver-Mate or Stab- Plate applications. The Nautilus Ethernet harness has a maximum length of 77 meters of total circuit lengths from network card to network card. Electrical characteristics such as cross-talk, attenuation and return loss are evaluated as part of the FAT testing to ensure proper communication between any network interface chip set.

What Do We Offer? Design Fully Qualified for 10/100 Base-TX Ethernet Communication Jumper Uses 12-Way Connectors: oSpace and orientation of communication pairs is important. oMay offer other configurations, but development and testing is necessary. Maximum of 77 Meters Total: oCircuit distance between Network Interface Cards (NIC) Includes: pigtails, node harnesses, science harnesses Maximum Working Depth of 1400 Meters: oWorking on high-pressure penetrator configuration to improve differential pressure rating.

What is the Configuration? Node Harness 12-way Bulkhead Receptacle: o~3 m harness from communication bottle to exterior bulkhead Science Harness 12-way ROV Plug: o71 meters maximum (with 3 m for Node Harness, 3 m for pigtail) No Crossover in Cable Wiring 2 Pairs can be Used for Ethernet Communication

Technology The Physics of Ethernet - Two Main Concerns: oAttenuation: Loss of Signal Strength over Length of Harness Limits the length of the circuit (harness) oNear/Far End Crosstalk (NEXT or FEXT) Pair spacing and orientation dictate amplitude –Crosstalk occurs in connectors and penetrators The Wet-Mate Solution: oODI has designed a connector & harness solution to accommodate these concerns. oODI has successfully qualified connector & harnesses to the following specifications.

Specification Ethernet Channel Characteristics: oPer ANSI X3.263 – 1995 Customer Specifications: oMARS Node Science Harness Cable Specification per SP oVictoria Experimental Network Under the Sea System Design Requirements, Version 1.1, 7 June 2004 Future Customer Specifications: oNeptune Canada – University Victoria As above but with increased depth requirement.

Y – Splices in Ethernet Circuits It is Possible for Half Duplex Communication Only, BUT: oNot recommended by IEEE Ethernet standards oY-Splice harnesses cannot be properly FAT tested oAffects to circuit are there even if one NIC is powered down System May Work in One Configuration But Not All Configurations: oHarness length changes oDifferent NIC units NIC Y-Splice ~ ~ ~

Markets Oceanographic Oil & Gas Defense Any Sensor or Controls Application Example: MARS System Drawing

Summary Fully Qualified Wet-Mate Connector Harness - 10/100 Base-TX Communication 77 Meter Total Circuit Length Wet-Mate Nautilus Connector Oil-Filled Harness Full Differential Penetrator MARS Node Under Construction