February 25th, 2008


The manned dives on the NiTek X are moving along without any glitches. We are now into the military testing on case integrity with extreme heat and cold testing along with interval pressure checking. We are still waiting on the back lighting to complete the production beta units. We are pushing the vendor to give us a delivery date. More information on the intuitive decompression model: The NiTek X gas list is for the dive, just like the older NiTek HE you program in the gasses for the dive. The NiTek X assumes you will use all these gases for the dive with change points of 1.6 PO2. This allows the computer to look forward on the decompression schedule and predict your decompression. This was a feature I had asked for so I could have some real information when 2000 feet back in a cave at over 200 feet in depth. The decompression schedule shown on the NiTek HE would lead you to think you would never get out of decompression because it only looked at the current breathing gas when computing total decompression time. The NiTek X will look forward and show you a more realistic schedule. If you don’t use all the gases programmed it doesn’t affect the decompression schedule, you just don’t get accurate total ascent time information. Jerry experienced this on a dive last week when 95% was programmed in for a deco gas but he didn’t have it with him. The real decompression time was accurate but the total time was telling him he could get out earlier if he would make the gas change.

We have been asked by some customers if we will handle service repairs on the NiTek X in-house. The answer is yes. We have computer technicians dedicated to servicing the NiTek X and will offer service in the same time frame as most of our products – 72 hours turn around.


February 13th, 2008

NiTek X Beta Test con’t


Rose Sink Cave System, FL

Feb 11, 2008

My dive required using CCR so I ran the Nitek X in CC mode and compared the decompression schedules between the Hammerhead and Nitek X. I ran a set point of 1.2 and programmed my diluent as air. I had to survey the cave out from maximum point of penetration: 4800-feet to my last station from a previous dive. The display on the NiTek X made the survey work easier because of the large depth display, plus the depth reading to a tenth of a foot.

The first deco stop was at seventy feet after 110 minutes of bottom time. Usually this is where I avoid looking at the total deco time on the Hammer Head CCR Electronics or the NiTek HE because they always show more deco time than actual deco until you get to the shallower stops. Yesterday, the Hammer Head was showing 134 minutes of deco, yet the NiTek X was showing 74 minutes. I had asked the NiTek X designers to build in some type of intuitive deco stop time. I wanted to have a real deco check at depth and penetration so I knew when it was time to come home. It works in CC mode and is being checked on a similar dive today in OC mode.

The deco countdown went like clockwork following the 74 minute schedule. I watched the CNS clock on the left of the display climb. The CNS tracking is on the left side of the screen, the 9 pixel display fills up in partial pixel display so you get a more accurate measure of the CNS clock. The NiTek He would jump a full pixel on the display for every 12.5% of use. After seven pixels on the CNS clock the eighth pixel came to life as just a line, but this pushed the CNS clock to 80% and the display started flashing. The Hammer Head deco began accelerating the total deco time and matched the Nitek X at the 30-foot stop. Both the Nitek X and Hammer Head cleared within one minute of each other.

The testing is going well. A few more tech dives are needed to verify some of the alarm features. The only way to really know if the NiTek X is performing properly is to do the dives.

I guess I need to go diving again. Lamar.

Rose Sink Dive Profile 2.8.08

February 7th, 2008

NiTek X Update


I know everyone wants it now. These projects take time and we are diligently working on it. The major delay is the custom backlighting. The vendor had machine problems delaying production. We are one of the first production runs to go on the new machine, but that will be at least one more week. In the meantime we have another beta without the backlighting and power management system to continue the testing and validation. The software for the logbook function is finished so we can begin testing that as soon as the Fischer connectors come in. Test dive results to be posted soon.


February 1st, 2008

Cold feet in drysuits


A couple of weeks ago, one of our Ambassadors was in town for an O2ptima crossover. A filmmaker, he works a lot in freezing cold temperatures and mentioned that his feet are frozen after several hours on the boat looking for the wildlife he is going to film.

We gave him a 905 drysuit that comes standard with neoprene boots and I explained to him the principles behind proper insulation. That is, you have to give room for air to move inside the boot. If you stuff your feet into a boot, the insulating sock will compress and lose its ability to keep your feet warm. A proper fitting boot will allow for air to move in the boot so the loft of the sock can maintain its form and your feet will stay insulated. The same principle works for undergarments on the torso.

It got me thinking, so I wrote an article about drysuits and undergarments. It is published in the download section of our 905 drysuits, Polartec and Primaloft undergarments. Article: Selecting Drysuits and Undergarments

Our Ambassador was impressed with the suit and is now wearing a 905 drysuit and Primaloft socks. Dive Rite Ambassadors