DELTA P and their Closed Circuit Research on the Houston DEMA 2004 Located on the opposite side from Jetsam was DeltaP Technology http://www.vr3.co.uk  and Closed Circuit Research http://www.ccrb.co.uk Kevin Gurr showed he Ouroboros to the American public for the first time last year. While an impressive machine, it was also a rather large one. Kevin didn't bring it this year.   Instead, he suprised everyone with the beautifully finished 'civilian' version of the Ouroboros. While by no means a small rebreather, like the SportKiss or Evolution, its bulk is considerably less than the 'military' version shown last year http://www.therebreathersite.nl/02_Photo_Galleries/Images/Dema2003/WALKER/dema2003.htm  To give you an idea of the overall size, the mounted cylinders had a capacity of 2 ltr/13 cu.ft. .   The cover is a piece of art in carbon fibre, and this shot shows the lower depth in comparison to the military unit. This is due to a smaller scrubber cannister. As with the designs that inspired it, hydrodynamic properties should be very good. Also visible are some of the features that have remained the same. The crush resistant breathing hoses, seal less DSV, the dual displays and one of the two switch blocks. The Ouroboros allows for both off-board O2 and diluent supplies to be plugged in here. Routed over the respective shoulders, they also feature the manual add buttons.   The electronics pod still has the buddy display with pO2 readout and warning LED's, as well as wet contacts, in the lid.   The most obvious change is that the tanks have moved to the outside of the case, where they are neatly tucked into a moulded recess. This decreases both the heights and depth of the unit. Stainless steel piping and hoses have been retained.   So has the sensor layout and number. Three sensors to run the onboard electronics and a fourth cell space for either a redundant O2 integrated deco computer or a CO2 sensor once they become feasible for recreational use. The cells have their own moisture traps to prevent condensation influencing the readings. The encased, rear mounted, split counter lungs sit on the opposite side of the center section but were not installed on the displayed rebreather.   The primary display is wrist mounted and can display an enormous amount of information, from pre-dive checklist and deco planning/simulation to O2/diluent contents, system status and alarms, deco obligation and dive profile graphs. On the left side a closer view of the offboard diluent connector and manual diluent addition button.   The secondary display with the three O2 cell readouts. It's a digital voltmeter, like the primary backlit and with its own battery. Sharing the cells in the center section, it's software independent from the primary and displays pO2 values, actual mV readings and its own battery alarm.   The HUD has four colour status and alarm LED's and conveys (from left to right): White: general Alarms indicating system ok, low gas content, high gas use, low battery Blue: solenoid Valve status: okay or malfunctioning Red: deco info - stop required but ceiling not reached, at deco ceiling, deco violated Green: pO2 setpoint status: on setpoint, off setpoint or way off (<0.16 or >1.6) All of these warnings can than be verified with the primary display. The displays are prototypes, wiring visible in the secondary and such will be cleaned up for production.   The lower profile radial cannister. The lid is spring mounted and reportedly doesn't require any tapping during filling, speeding up that process quite a bit. It has a  2.7 kg/5.94 lbs. capacity and is rated for 150 minutes to 0.5% CO2 concentration at 4 degrees C/39.2 degrees F, 40m/132ft, 1.6ltr/min CO2 with air as diluent.   A look inside the scrubber cannister, like the rest of the Ouroboros very solidly build. Considering this is still a prototype, Kevin's craftsmanship is very impressive.   DeltaP Technology displayed the VR2 and VR3 computers. The second VR2 on display was nobody-will-ever-steal-it hot pink, but US rep Tamara Thomson tami AT diversions-scuba.com promised a more subdued black is also available. On the hardware front they showed the new colour screen VR3 and the HP cable link. The colour screen enhances screen visibility and gives warnings and notifications in colour. The HP cable link allows the computers to be used as a gas integrated computer, displaying gas content and SAC during the dive, remaining dive time based on it both in minutes and as a graph, recording start and end pressure. The sensor is mounted to the tank valve and the cable connects to the computer. There is no high pressure hose, so in case of damage you loose the contents display, not the gas, a safety factor not to be underestimated. Other advantages are the lack of interference and additional battery when compared to wireless integrated computers.   They introduced the Version 3.0 software which improves readability with a new font, larger characters and an enlarged active screen area, as well as easier to use menu's. It also adds new profile screens displaying a temperature graph as well as the depth graph, the before mentioned gas consumption graph as well as the ability to place 'marks' in the depth graph. The new C-5 Software package adds 'Decobooks' which can be transferred from PC and customizable screen savers.