Rebreather World - View Single Post - SAR K9 Diver

Doorduijn, Niels · 30th December 2006, 23:00

6 meters equals something like 18', right? Are you sure that the extra 7' that you are referring to is worth going into CCR for? From an operational point of view, an O2 rebreather would otherwise be best suited for your purposes (the size difference between an O2 rebreather and of an Inspiration or Optima is very significant). Also, an O2 rebreather is much cheaper. (Obviously, this does require an environment that the current cannot push you into deeper water).

As for the bubles on a Ray. The amount of bubbles is linked to the orifice used in the unit. Each orife is keyed to a certain FO2 in the breathing gas. There is an orifice for 30, 40, 60 and 100% O2. The higher the percentage, the lower the gas flow through the orifice, hence less bubles. Moreover, Draeger makes a device for its military SCR units to break the bubles into very tiny bubbles (for a picture: see http://www.therebreathersite.nl/Zuur...er_lar_vii.htm , look at the top of the unit). I do not know whether it would work with a Ray, but if your organisation is linked to the government, perhaps Draeger would be willing to help you out. (The picture is of a LAR-VII unit, which in Europe are very rare units, used mainly by the military).

From what I have seen, the Kiss Sport rebreather is a lot smaller than the Optima. Personally, I would not consider purchasing the Optima as it is a new unit on the market and I prefer not to pay a producer to help him work out the initial production and quality issues (especially when there are units on the market which have been around longer). The Sport Kiss has not been long on the market, but its big brother, the Kiss has been, and the Kiss has a very good reputation.

[To be sure & honest: I have not yet heard negative feedback on the Optima and I am not sure about the reasons herefor. New units always seems to go through phases of improvements and I would expect the same with the Optima.]

The Inspiration is a well proven unit, but a "normal sized" CCR: you have to keep in mind that you will be carrying the unit on your back, have the counter lungs in front of you and the hoses going over your shoulders to the DSV (mouthpiece). The Inspiration has a little sister, the Evolution, but like the Optima it has only been in production for a short time.

When you try units out in the pool, remember that CCR diving is different from OC diving. Your buoyancy will be all over the place.

Best wishes,
Niels Doorduijn

30th December 2006, 23:00	#8 (permalink)
Doorduijn, Niels Custom Title Allowed! Current Rebreather/s: Inspiration Classic MK 15.X Dolphin Other Rebreather/s: Dolphin Join Date: May 2005 Location: Netherlands Posts: 53	Re: SAR K9 Diver - CCR help 6 meters equals something like 18', right? Are you sure that the extra 7' that you are referring to is worth going into CCR for? From an operational point of view, an O2 rebreather would otherwise be best suited for your purposes (the size difference between an O2 rebreather and of an Inspiration or Optima is very significant). Also, an O2 rebreather is much cheaper. (Obviously, this does require an environment that the current cannot push you into deeper water). As for the bubles on a Ray. The amount of bubbles is linked to the orifice used in the unit. Each orife is keyed to a certain FO2 in the breathing gas. There is an orifice for 30, 40, 60 and 100% O2. The higher the percentage, the lower the gas flow through the orifice, hence less bubles. Moreover, Draeger makes a device for its military SCR units to break the bubles into very tiny bubbles (for a picture: see http://www.therebreathersite.nl/Zuur...er_lar_vii.htm , look at the top of the unit). I do not know whether it would work with a Ray, but if your organisation is linked to the government, perhaps Draeger would be willing to help you out. (The picture is of a LAR-VII unit, which in Europe are very rare units, used mainly by the military). From what I have seen, the Kiss Sport rebreather is a lot smaller than the Optima. Personally, I would not consider purchasing the Optima as it is a new unit on the market and I prefer not to pay a producer to help him work out the initial production and quality issues (especially when there are units on the market which have been around longer). The Sport Kiss has not been long on the market, but its big brother, the Kiss has been, and the Kiss has a very good reputation. [To be sure & honest: I have not yet heard negative feedback on the Optima and I am not sure about the reasons herefor. New units always seems to go through phases of improvements and I would expect the same with the Optima.] The Inspiration is a well proven unit, but a "normal sized" CCR: you have to keep in mind that you will be carrying the unit on your back, have the counter lungs in front of you and the hoses going over your shoulders to the DSV (mouthpiece). The Inspiration has a little sister, the Evolution, but like the Optima it has only been in production for a short time. When you try units out in the pool, remember that CCR diving is different from OC diving. Your buoyancy will be all over the place. Best wishes, Niels Doorduijn Last edited by Doorduijn, Niels : 30th December 2006 at 23:36.
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