Dive logs in 2026: paper, digital, or none
The reality of logging
Paper logs get wet. I lost my entire 2014 Komodo logbook when a heavy swell hit my boat near Padar Island. That book contained 142 logged dives that I could not easily recreate.
Digital logs offer more security. While a cloud-based app might fail, a local file on your phone or computer remains accessible even without a signal. You need a reliable record because insurance companies often demand proof of dive history during a claim.
Data is vital.
Why you still need records
Training requires proof. If you want to take a Rescue Diver course with SSI, you must prove your experience levels. A digital dive log app makes this verification fast because it exports clean PDF files for your instructor.
Safety comes first. Divers should track their nitrogen loading and surface intervals over several days. I noticed my decompression limits changed significantly after I started using more precise digital tracking in 2021.
Insurance needs data. DAN (Divers Alert Network) or other providers may ask for your dive profiles after an accident. They need to see your max depth, such as a 32 m dive, to assess risk factors.
Logs track progress. You can see if your buoyancy improved over 50 dives. This is helpful when you plan to move from recreational diving to technical courses.
The death of the paper book?
Paper is fragile. Salt water destroys ink and paper quickly. I once saw a diver try to show an instructor a soaked logbook in Cebu, but the entries were unreadable.
Physical books feel good. There is a tactile satisfaction in writing with a pencil after a long day of diving. Some divers still prefer this because it does not require battery life or a screen.
Digital wins on space. You cannot carry 200 paper books in your backpack. An app stores thousands of dives in a few megabytes of storage.
Paper is risky.
Digital dive log options
Subsurface is powerful. This open source software works well because it allows you to import raw data directly from your computer via USB. It is not pretty, but the data integrity is high.
Diviac offers convenience. It functions as a cloud-based service so you can access your logs from any device. You might pay a subscription fee, which can be around $15 USD per year for premium features.
MyDive and DiveMate are alternatives. These apps focus on user experience and social sharing. They are great for casual divers who want to show off photos of a 25 m reef dive.
Syncing is hard. Many apps struggle when you try to move data from a Garmin computer to a mobile device. You should check compatibility before you buy a new dive computer.
Data standards and connectivity
Computers use protocols. Most modern units use UDDF or DAN-DL7 standards to export dive data. If your computer does not support these, manual entry becomes a tedious chore.
Bluetooth is common. Many new computers sync directly to your phone via Bluetooth. This works well until you enter a remote area like Tubbataha where signal interference is high.
USB remains king. A physical cable is often more reliable than wireless connections. I always carry a spare USB-C cable in my dry bag just in case.
Manual entry is a backup. If the tech fails, you must write it down. Do not rely solely on a single piece of hardware.
Privacy and cloud concerns
Cloud apps store data. When you use an app like Diviac, your dive locations are on a server. Some divers worry about privacy because they do not want their travel patterns tracked.
Offline is safer. Using Subsurface on a local laptop keeps your data under your control. You avoid the risk of a company going out of business and deleting your history.
Security matters.
Always use strong passwords. If your dive log contains your GPS coordinates, it is sensitive information. Hackers can use this data to track your movements in real-time.
Comparing the workflows
Paper is slow. You must find a pen and a dry surface after every dive. This often leads to forgotten entries or inaccurate depth readings.
Digital is fast. You plug in your computer and the data populates instantly. This reduces human error because the computer records the exact 28 m depth you reached.
Hybrid is best. I carry a small notebook for immediate notes. Then, I upload everything to my digital log once I reach my hotel Wi-Fi.
This method works well. It ensures that even if my phone dies, I have the raw numbers written down. You should adopt this habit early in your diving career.
Choosing your system
Assess your needs. Are you a technical diver or a holiday diver? Technical divers need the precision of Subsurface because they track complex gas mixes and deco stops.
Check your gear. Ensure your dive computer can talk to your chosen app. It is frustrating to buy an expensive device that cannot export its data easily.
Budget for it. Some apps are free, while others require monthly payments. Calculate the cost over five years to see if a subscription makes sense.
Start logging today. Do not wait until you need a log for a course. A gap in your records can delay your progression toward becoming a Divemaster.
If you are currently diving in Southeast Asia, start by downloading Subsurface and testing it with your current computer data.
Frequently asked questions
Can I use a digital log for PADI Advanced Open Water?
Yes, most agencies like PADI and SSI accept digital logs if they show clear timestamps and depths. However, you should always keep a backup because some instructors in remote areas like Koh Tao still prefer physical signatures.
What is the best open source dive log?
Subsurface is the most reliable open source option available in 2026. It allows for deep customization of dive profiles although it has a steeper learning curve than consumer apps like Diviac.