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That’s good advice.This advice is good for really any technical gadget you may get (camera, cell phone, dive computer, etc...)... First, read the manual enough to learn how to use your dive computer and learn the basic functions and what it is capable of doing. Then use your computer to dive. But after you've used it a few times, get the manual back out and re-read it.
Often reading a manual can be mind boggling because there is so much information and for a lot of people who may be new, it can be overwhelming. So learn how to use your computer but, after you feel some comfort level with it, go back and re-read the manual. Things that didn't make sense will start to make sense or at least maybe you can decide how important certain features are. Those advanced features may start sounding useful!
Plus repetition is the best way to learn so read, use, then re-read (and repeat!).
Yeah, and that's the trouble with dive computers. You can't really access dive mode(s) unless actually on a dive. So, while you may read the manual, and think you understand it, the first time you can really see what happens is during that first dive with the computer.I find that during a dive you realise you are unsure of something you read in the manual when using a new computer.
You’ll need a Perdix 2 for that last part!What I recommend all NDL divers do is set an alarm on your computer to notify you when your NDL is under 5 minutes. You can do this on the Perdix. A visual reminder is good but in addition a vibrating warning is best if you get distracted and don't look at your computer.