Can the Apple Watch Ultra replace a dive computer? As of the beginning of October, Oceania+, which was introduced at the press conference, has not appeared, so there is no dedicated diving computer app for Apple Watch Ultra. In early October, I went to Xiaoliuqiu for a diving trip. I decided to bring my watch and my original diving computer, Atmos Mission 1 makes a simple comparison. This is the third time I came to Xiaoliuqiu. This time, the luck is good and the weather is good. About the appearance of the watch, its mountaineering and off-road function, its running , its battery life and the comfort of the band, many people have already shared their review Just sharing my own feeling. I think the Ocean band is a little bit stuck when wearing it. Although it is to increase the stability , the titanium clasp is a bit difficult to pull out when it's wet or when my hands are wet. This is a bit I think the trouble is. One is Atmos Mission 1 and the other is Apple Watch Ultra First dive lobster cave Wait and see the difference between Apple Watch Ultra and Atmos Mission 1. This is the first time to enter the water. Simple test Start my M1 at a depth of 1.8m. The Apple Watch seems to start as soon as it enters the water. The famous sea turtle from Xiaoliuqiu is here. The depth of the two watches seems to be about the same. Ask him what he thinks of this watch. Fine, I will continue to look at my watch. I am lucky this time . The turtles in Xiaoliuqiu are very face-saving. Compared with other places, the turtles in Xiaoliuqiu are less afraid of people. Everyone should be careful not to touch them. Gradually increase the depth and see more and more things at this time . I think the brightness of the Apple Watch Ultra is friendly on the display. After the first one went out from 100% in the morning to the afternoon, it was used normally all the way to Xiaoliuqiu. After the first dive, the battery remained at 77%. The next day, the weather was good and the sea conditions were also good . Put on two watches, the wreck is not our boat. We came to the classic dive site Venice wreck. This time , we gather on the surface and try the effect of starting again. Apple Watch is more sensitive and gradually dives . This time, it is strange that the depth difference between M1 and Ultra is about 0.5m . I found the coach's watch to compare. His watch is Shearwater Teric, which is also a well-known computer watch. It seems that the Apple Watch is relatively close to the coach's watch. Where the light source is weak, it is obvious that the better brightness displayed by the Apple Watch Ultra is more than 30 meters deep . No problem so far and the Apple Watch seems easier to read here's a lionfish Apple Watch has a bit of a nuisance until there is no dedicated diving app be sure to bring another computer because I need to know my no decompression time (NDL) as well It is the place circled in the picture . The deeper the depth, the shorter the decompression -free time. When the time is zero, you must enter the decompression mode, also known as DECO , and there is a very important safety stop at the end of the dive. Usually we do a 3-minute safety stop at a depth of 5m. Generally, the dive computer will display Your stop time After finishing the stop, you can slowly emerge from the water . Friends who are interested in diving theory can search for it, but there is a very important concept. Scuba diving must ascend slowly and not hold your breath, otherwise you may have a chance of decompression sickness. It 's just a diver's disease . Here 's a comparison between my own Atmos Mission 1 and Apple Watch Ultra , and my coach's Shearwater Teric . It seems that Apple Watch is relatively close to his depth display. I also found an interesting thing here. The phenomenon that someone shared before that the siren of the Apple Watch Ultra would not make a sound when soaking in water. I tried it here and when the water came out, it seemed that there was really no sound. After I went ashore , I finished the drainage and the sound was completely dry. After diving 4 pieces from the morning From 100% to 56% now , this endurance is acceptable for my own diving habits, but compared with many dedicated diving computers, this is still slightly insufficient. In addition , the display of depth and water temperature is a bit strange to me . You need to go to the fitness room to see your underwater depth. Some foreigners have shared more than 40m , although it will show more than 40 , but you can still see the precise depth here. So if this function is opened to the public in the future , some three-party app support is available. Opportunity to show depths above 40. For your safety and recreational diving, please do not exceed 40 meters. Although Apple Watch Ultra is not a diving computer now , if the app support is complete enough in the future, I may continue to wear it. Wear it. Watch the sunken ship, watch the blue-spotted stingray , watch the salamander, watch all kinds of pufferfish, watch the cute damselfish and the clownfish, the clownfish is really fierce Its professional diving watch function At this stage , I may ask my friends to share the family plan together, but I am more looking forward to the official offer or a stronger third-party development dedicated app . The above is this simple sharing . Welcome all diving friends or It is a friend who has other use experience to discuss together. Safe Dive!