IS THIS G-SHOCK (NOT) A DIVE COMPUTER?; {GWF-D1000;} 

Jeff Mutter I can see how you’ll use it to log your dives but you honestly don’t use a computer and use tables on every dive? This is a back up at best, what do you use as a backup?

Wile E. Coyote If you exceed the no decompression limit (NDL), you can no longer ascend directly to the surface without doing a series of decompression stops at staged intervals to allow the nitrogen in your body tissues to dissipate. Incidentally, you’ll find the NDLs printed on the bands of some Citizen dive watches if you’ve ever wondered what those numbers mean. If you accidentally exceed the NDL, a dive computer will guide you through your stops on your ascent, letting you know the depths at which you must stop and for how long. The alternative is that you use a timer and a set of dive tables to calculate and plan your stops. You can imagine the advantage of having a computer in this scenario. With the exception of a ‘safety stop’ (e.g. 3mins @ 5m), most recreational divers prefer to avoid decompression dives and stick within the NDL. Technical divers, recreational, commercial or military will meticulously plan decompression dives in advance in order to ensure adequate breathing gas for the extended duration of their dives. To add further complication, they may also carry more than one breathing gas, sometimes in a ‘pony’ or side-slung cylinder and switch to this during decompression to ‘accelerate’ their decompression time by breathing a mix with less nitrogen and more oxygen to reducing their ongoing nitrogen load and help the nitrogen dissipate from their body tissues. You may have heard of ‘rebreathers’ essentially the rebreather automatically manages the diver’s breathing mix throughout the dive for maximum efficiency. Really beyond the scope of your original question, but the use of rebreathers among recreational divers highlights a trend toward the use of technology and increasing automation. Thanks for asking. Given the popularity of dive watches, it’s useful to put some of this information out there in the watch community.

Are there other dive watch brands besides Citizen that print the NDL numbers onto their watch bands? Are there companies that make the bands alone? Thanks for sharing.

​@@franka7691Only Citizen does that, and I think that's why it's a very popular dive watch among actual professional divers. They use it for its functionality, not for its looks.

Matt I hear you but for most Rec divers they would not need to buy an expensive dive computer...this watch gives your general Rec diver all the data they need to log their dive proper...80% of divers are rec and aren’t mixing gases and pressure group is a function of a divers max depth and dive time...not time at different depths

@@jeffmutter2286 If you're going to be using tables and calculating your dive profile it's fine to use any timing device, even a $40 regular G-Shock. We stopped using tables in the industry a while back and it's not particularly even taught to new divers anymore. Haven't had a single person dive with tables in the 10 years I've worked in the industry. Cheap computers can be had nowadays for $200-$300US. My original point however was that the Frogman is not a dive computer, not wether diving without a computer is possible.

I am old school and still use em...dive tables I mean...had a computer and dumped it...just wear the Frogman now...I was certified in 2000, so I guess I am an antique diver. LOL To me it is a computer for diving though...that was my point. Enjoy the new World dive technology and dive on.

Yeah a real dive computer includes a human tissue model in it to compute how much nitrogen your body is absorbing, and rate of outgassing it does in between dives, so you don't have to use the go through the dive table manually based on your dive time only. And when you use the manual dive tables you have to default to the least common denominator which assumes you were at max depth the whole time... so using the dive tables safely means getting a lot less time underwater before you have to come up, after your first dive that day. Plus computers will compute your absorption and out-gassing when you're on the plane flying to your destination so you'll know very well when you are ready to dive once you get to your location, and for how long (flying at altitude in an airplane has the same affect on your body tissues as coming up from a previous dive at depth). So you can go through all the manual table with your g-shock timer and depth log functions, or you can wear a computer on your wrist everywhere you go and it will tell you when you can dive and for how long, and how deep, as you dive. The computer is easier... but if it breaks, to be safe you have to stop diving for at least 24 hours so that you know on the next dive you're starting the dive tables that you'll have to start using, fresh and safe. Everything I'm talking about is for recreational sport divers on regular air tanks... not mixed gas diving. 100% of sport divers should at least be using dive tables and pressure groups, or a dive computer so they don't have to assume max depth, and get a lot more bottom time during their dive vacation. Me, I'm both a sport and commercial diver. When I fun-dive, I use the watch and manual tables.... I don't like trusting my life to a device that might break and cause me to lose a whole day of diving on vacation. Plus I love lounging on the boat in-between dives eating cantaloupe in the saltwater air... gives it a great taste. So I always have enough surface interval that it doesn't affect my dive time. The only time I wish I was using a computer is in during multi-level dives that have a lot of difference between depths. If there's not a lot of difference and I've gone really deep for a while, I'll run out of air before hitting my max bottom time allowable. Bottom line: the Frogman is NOT a computer. In the video definition he missed the key last phrase: "based on your previous dives that day" -- this is where the human tissue model, gas absorption, and out-gassing come in... none of which are in the G-shock. I own two Frogmen: One that I actually use for diving (the Antarctic collaboration) and another that I wear for fashion and treat very gingerly that I LOVE (the Coast Guard collaboration in yum-yum green).

Matt Steemson Totally agree with you that this isn’t a dive computer. It would make a useful depth timer but the Scubapro/Uwetec timer is only £100 and is very easy to use and great as a back up. I don’t see why anyone would not dive with a computer these days as there are cheap, reliable ones on the market. I generally dive with a computer (Shearwater Teric) and a depth timer as a backup (Scubapro) and I take tables as a back up on a tec/deco dive, specifically for that dive. I’m really not sure where this watch would fit in my diving.

I agree this is in no way a dive computer or a substitute for one. As a Public safety diver I can assure that while this is cool and I do own one myself and take it on dives this is not a backup to a computer. I see a lot of people reviewing the frogman saying the same thing. Which is quite dangerous if someone were to use this watch over a dive computer.

​@@zachariaswalden4082So a backup to a dive computer is another dive computer? I see a lot of ppl claim that they use their analogue dive watches (e.g. Rolex Submariner) as a backup tool. Are those ppl completely lying or just ignorant about how diving professionals actually work?

Gw-5000 is dope. Quit copying jory goodman tho. Shit hits the fan is not a category of watch!

Sounds safe enough.

Yeah, I think Citizen is the go to brand for actual professional divers.

you gotta remember that there are two class of wristwatch man, gshock, then others :)

Why you only like G shocks because they are cheap? You might think that way but sinn and seiko and G shock are for different people. Not everyone who has money wants a mechanical watch.

I Gwf-d1000 owner, if this model have a GPS or Bluetooth... I never bought it.

I’m rocking the triple crown version as my daily driver.

;D

Whatever the difference is, people could & had been using it for diving. Ever since the first frogman back in 1993.

@@gshockhighfashion Exactly.

Use my special link here bit.ly/buyee-gshockhighfashion

Which Japanese factory the watch is made in?

It’s redundant it’s why they removed it if your diving especially at 100m or more without a proper dive computer you are asking for trouble and or death. dive watches are a good backup and are used as such. if you rely solely on this to protect your life in the depths of the ocean you’re completely crazy.

This watch will constantly tells all that info except gas consumption part. It didn't have a connection port. Not yet for this series.

gshock highfashion it does not work out your NDL or deco, it also doesn’t work out your bottom time based on your gas mix, therefore it’s not a dive computer. Please stop misleading people.

Prête 🆗

Interesting. Maybe they'll release a different one soon, they always make new master of g from time to time.

@@gshockhighfashion I really hope so, they had some pretty sick dive watches back in the 90s which is still own. It feels like they are very scared to take innovative risks like they once did.