I am not trying to 'sell' you on a computer, but I would say there is limited reason to say a computer is less reliable. That's why I commented on watch failure in my post above.I agree that the computer gives you more flexibility. My main concern is that I don't dive often, and mostly just when I get the opportunity to go on vacation, which sadly, is not as often as I would like. Having a computer die on me during a dive, or just before a dive, means a significant loss in time, money, and effort if I have to cancel a dive (either during or at the last minute). I might only have 1 opportunity on a dive boat that year, and if my gear were to fail, then I'm SOL until next time, which could be years away. For this reason, I'm more interested in a more reliable set-up that will last me for many years.
If you are worried about gear failure cause loss of dive, hire for from dive operator. That is probably the best way to ensure you are covered, if it fails they provide other equipment or refund you money.
What are you plans for your reg? Will it be serviced at some point, could it fail... I have had more reg/hose failures than computer failures.
There is no reason the computer would be obsolete. That is like saying the tables and gauges are obsolete. The computer basically measures time and depth and applies "tables" to determine nitrogen saturation. My view is the main feature that has become standard on recreational computers is nitrox.Computer technology changes so rapidly...
The reason I use the Mares Puck is it was not expensive and is good for recreational diving.
Make sure the computer has a user replaceable battery and that it is a 'standard' battery. Many computers use the 2450 lithium battery. I would be worried with a rechargeable non-replaceable battery as it may deteriorate over your timeframe and not hold charge.
One feature that may be good is the timer for your safety stop.
That sounds reasonable, but you have had to buy the depth gauge, and it will become redundant.I totally understand the benefits of computers, I'm just not sure if the economics buying a computer works in my particular situation where I'm happy to be using tables and having reliable gear that I know will work when I get there. With that all said, I think my idea set-up would be a traditional gauge (SPG and Depth on a console) set with a simple computer as a nicety, but not something that I'm relying on to be a primary system. With that in mind, I'm looking to get the gauges sorted first. Then, if I want to go with a computer, I can start thinking about that.
Once you dive the computer you will have longer bottom time than the tables predict. If the computer fails on a dive then it is difficult to go back to tables as the tables will predict much higher nitrogen than the computer give the square dive profile. I have worked this through with divers and a change from computer to tables between receptive dives (where the dives have been near to the computers NDL) either shows exceeding the tables or an extended SIT prior to the next dive.
The computer will, for most dive profiles, give you a longer NDL better value for your dive money... Happier buddies.
Yes sorry I have gone where you clearly did not want to go, but only as I see this as the best option even if your diving is limited.The original intent of the thread was to see what brands are considered good when it comes to mechanical gauges and what I should be looking for in a traditional gauge set. As an example, I was hoping someone would be able to say "avoid such and so brand" or "look for this feature". I think this thread has provided really good information in that regard concerning the SPGs and I'm not much more informed about what to be on the look out for.
I really don't want to get off track into the computer vs. traditional arguments, there's plenty of other threads for that.
With regard to gauges:
Many comments on SPG above. I like smaller size and don't mind plastic in a boot.
I have used many brands of depth gauge and really they are much of a muchness. You need to treat then with some care (as too the SPG) as calibration can be impacted by a sharp hit/full.
As far as a timer goes I have used battery and clockwork watches. Must remember start the timer (digital) or set the bezel (analogue) when you leave the surface. And for analogue watch, catch the time when back at the surface, digital stop the timer.
If you plan to use a dive digital timer, with auto start and stop, then just get a computer