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Scuba Forum / General / December 2006Suunto Stinger locked after shallow dive
Hi, I experienced a strange behaviour of my Suunto Stinger due to an unusual dive profile. I explain: 1st dive at max 40 m. for 35 minutes. Got 2 minutes deco stop at 3 meters that went away during slow ascent. Safety stop at 5 meters for 3 minutes. I was bringing up an old anchor so at the end of the dive I left it 2 meters deep and went back to the boat to bring a rope and some buoys. Got back to the anchor after 6 minutes and made a 2nd dive at max depth 2 meters for 3 minutes to fix the anchor to the buoys. Probably there was some up and down involved in the operation. My Stinger sounded a couple of times (fast ascent?) but I did'nt care as I was quite busy fixing the anchor and in very shallow water. Back on the boat I noticed the Stinger locked in Err mode due to omitted deco stop. How could it possibly be so after such a shallow dive? Anyone has an explanation? Thanks, Bruno >Back on the boat I noticed the Stinger locked in Err mode due to >omitted deco stop. >How could it possibly be so after such a shallow dive? >Anyone has an explanation? If your surface interval was less than 5 minutes, then the computer considers your dive to be a continuation of the previous dive. If you offload your dive log to the Suunto Dive Manager software, you should be able to check your actual dive profile and find where you did something it didn't like.  SignatureRon (user ron in domain spamblocked.com) 1st dive at 40 meters. 2 minutes deco stop. Done correctly. 6 minutes surface interval. Then 2nd dive. Max 1.8 meters. The log shows some ups and downs between 0 and 2 meters, probably a fast ascent. That's exactly the question: how could it possibly signal a deco stop diving at 2 meters??? Bruno Ron ha scritto: > >Back on the boat I noticed the Stinger locked in Err mode due to > >omitted deco stop. [quoted text clipped - 7 lines] > to check your actual dive profile and find where you > did something it didn't like. > 1st dive at 40 meters. 2 minutes deco stop. Done correctly. > 6 minutes surface interval. [quoted text clipped - 3 lines] > That's exactly the question: how could it possibly signal a deco stop > diving at 2 meters??? Some of us have been telling others of us about the faulty algorithms in Suunto computers for a few years now. Don't come crying to us when you find out we were right. Send your information to Suunto and ask them to explain it. Lee >> 1st dive at 40 meters. 2 minutes deco stop. Done correctly. >> 6 minutes surface interval. [quoted text clipped - 11 lines] > >Lee Maybe the thing was upset that you got back in the water so soon after a deco dive. >>> 1st dive at 40 meters. 2 minutes deco stop. Done correctly. >>> 6 minutes surface interval. [quoted text clipped - 3 lines] >>> That's exactly the question: how could it possibly signal a deco stop >>> diving at 2 meters??? >>Some of us have been telling others of us about the faulty algorithms in >>Suunto computers for a few years now. Don't come crying to us when you >>find >>out we were right. >> >>Send your information to Suunto and ask them to explain it. > Maybe the thing was upset that you got back in the water so soon after > a deco dive. Doing a short, shallow bounce dive after required safety or deco stops is not a good idea. http://gue.com/Projects/WKPP/Decompression/nobounce.html Curtis >> 1st dive at 40 meters. 2 minutes deco stop. Done correctly. 6 minutes >> surface interval. Then 2nd dive. Max 1.8 meters. >> The log shows some ups and downs between 0 and 2 meters, probably a fast >> ascent. > Doing a short, shallow bounce dive after required safety or deco stops is > not a good idea. Normally, I'd agree, but penalizing him for a 6 foot bounce by locking up seems a bit excessive. I'm betting it was the quick ascent that did the computer in. If the computer can be downloaded. it probably should be and the results sent to Suunto for an explanation. Lee >> Doing a short, shallow bounce dive after required safety or deco stops is >> not a good idea. I suspect that bounce dive gave the computer some conditions it knew it couldn't handle, so it went to error mode. My one gripe with that is that the owner's manual should document it. >If the computer can be downloaded. it probably should be and >the results sent to Suunto for an explanation. Second that. See what Suunto says. SignatureRon (user ron in domain spamblocked.com) Hi, I have no way to download the dive profile but looking at the internal log it shows that it went in deco dive immediately at the beginning of the 2nd dive. So the deco has nothing to do with bounce or fast ascent but seems that the Stinger gets quite annoyed if you have a second dive too soon after a 1st deco dive. If I were within the 5 minutes it would be considered part of the 1st dive, but just 6 minutes drove it crazy. Suunto replied politely but they were totally useless. I quote their answer and you see what I mean ;-))) ------------------------------------------------------------ Dear Sir, Thank you for contacting Suunto. When your NO DEC TIME becomes zero, your dive becomes a decompression stop dive. This happend obviously after your first dive and the short surface time immediately when you went down for the second dive. Whenever the Stinger gives you an alarm, we recommend not to ignore it! ------------------------------------------------------------ Ron ha scritto: > >> Doing a short, shallow bounce dive after required safety or deco stops is > >> not a good idea. [quoted text clipped - 7 lines] > > Second that. See what Suunto says. Ron wrote: > I have no way to download the dive profile but looking at the internal > log it shows that it went in deco dive immediately at the beginning of [quoted text clipped - 3 lines] > would be considered part of the 1st dive, but just 6 minutes drove it > crazy. Then all I can say is that you've discovered yet another reason why I don't own a Suunto computer. > Suunto replied politely but they were totally useless. I quote their > answer and you see what I mean ;-))) [quoted text clipped - 8 lines] > Whenever the Stinger gives you an alarm, we recommend not to ignore it! > ------------------------------------------------------------ In other words, our computer doesn't work right, but since you can't tell why, we suggest you comply with what it tells you. Lee > Then all I can say is that you've discovered yet another reason why I > don't > own a Suunto computer. For the life of me, I cannot see any difference between folling a conservative computer, and using a liberal one and backing away from it's limits. >> When your NO DEC TIME becomes zero, your dive becomes a decompression >> stop dive. This happend obviously after your first dive and the short [quoted text clipped - 5 lines] > why, we > suggest you comply with what it tells you. I understand their answer. Sounds like they're saying he omitted his deco recommendation. Just another reason to not depend on a dive computer. ;-) Curtis Should read; > For the life of me, I cannot see any difference between following a > conservative computer, and using a liberal one and backing away from its > limits. > For the life of me, I cannot see any difference between folling a > conservative computer, and using a liberal one and backing away from it's > limits. One lets you decide what you chose to do. The other doesn't. Relative to being conservative, the questions of being conservative and how conservative to be are not the same. The Suunto under discussion locked the diver out after a single modest deco dive followed shortly by a dive to 6 feet. Nothing even remotely like that has ever happened with my Oceanic, my Genesis, my wife's Oceanic or either of my USD computers. Locked out is a pretty big difference. My big complaint with the Suunto computers is that they do not calculate MOD correctly. In the interest of being conservative, they calculate O2 at one percentage point higher percentage than what is entered into them and then proceed to calculate everying on the basis of that incorrect data. > Just another reason to not depend on a dive computer. ;-) Yeah, depend on one that has to stay on land instead. Lee >> Then all I can say is that you've discovered yet another reason why I >> don't [quoted text clipped - 3 lines] > conservative computer, and using a liberal one and backing away from it's > limits. I get upset when someone ruins my dive by having one that beeps all the flucking time......I don't care how conservative it is, if it has to beep, leave it on the boat. >>> When your NO DEC TIME becomes zero, your dive becomes a decompression >>> stop dive. This happend obviously after your first dive and the short [quoted text clipped - 12 lines] > > Curtis > I get upset when someone ruins my dive by having one that beeps all the > flucking time......I don't care how conservative it is, if it has to beep, > leave it on the boat. Certain Uwatecs, at least the Aladdin Air Z O2 and the Aladdin Air Z Nitrox will start beeping at 500 psi and continue to beep until the diver is at safety-stop depth. There is no way to turn this feature off, short of ripping the speaker out of the thing, which I assume might violate the warranty. Obviously most boats (and dive computer manufactures, probably) prefer that their divers are at least at safety-stop depth by 500 psi, but I feel that what I do with my air is my own business, especially if I'm on an AL80 and want decent bottom time. Last week I heard what I though was my Uwatec going off at >500 psi, but it turns out it was the video pro's. Apparently she likes to maximize her bottom time as well. When we got back to the boat, we shared rants about the noisy blue contraptions. She told me about a trip chartered by a dive shop where all the divers had them and it was a frickin' concert going off at the hang bar. I can't wait until I'm motivated enough to try to get my nice quiet Suunto its recall service so I don't have to dive with a backup and can reretire the Uwatec. >> I get upset when someone ruins my dive by having one that beeps all the >> flucking time......I don't care how conservative it is, if it has to [quoted text clipped - 18 lines] > recall service so I don't have to dive with a backup and can reretire the > Uwatec. Yeah, bullshark loaned me a Uwatec before I bought my Oceanic. One of the things that attracts me to diving the most is the peace, and the escape from the world of cellphones and car horns.....they just seem to defeat the purpose for me. YMMV. LD. I would like people who own or are considering to buy Suunto computers to be aware of the following: I don't trust Suunto on their computers. First they have known problems: http://www.suuntoservice.com/safetynotice/diving/ and second they have known problems they don't speak of such as a freezing problem of their Cobra computers. I know because mine, S/N 527334 froze at 85ft on me. no buttons worked and even when I removed it from the regulator, it still showed the pressure of over 2500PSI. I returned it to my dive shop who informed me they had at least one more returned for the same reason. It's been at the shop months now and I finally found out because I didn't provide my sales receipt, they didn't do a thing. Despite the fact that by the S/N they know it's less than a year old plus the unsafe condition of the device, you'd think they would have done something. Additionally there is nothing on their website about this problem. Of course no one asked me about my safety either so apparently Suunto isn't concerned with your safety or the safety of their dive computers nor are they willing to share their safety issues online. I would never even consider buying another Suunto dive computer. Suunto used to make great oil filled compasses but my suggestion is not to trust them with your safety using their dive computers. I have two Oceanic dive computers also, one VEO 250 and one PRO and have never had a problem with them. --Norman >Hi, >I experienced a strange behaviour of my Suunto Stinger due to an [quoted text clipped - 19 lines] >Thanks, >Bruno <plonk>
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