> ## Documentation Index > Fetch the complete documentation index at: https://scubazenapp.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Log a dive > Add a dive to your logbook: what each section records, what carries over from your last dive, and how unsaved and offline dives are kept. Tap **log a dive** on home, or **add dive** in your logbook, fill in whatever you want to record, and tap **save**. No field is required. If your last dive was today or yesterday, SCUBAzen fills in its rig and trip details for you, and a dive you haven't saved yet is kept on your phone if the app closes. ## Start a new dive On home, tap **log a dive**. Or open your logbook and tap the **+** in the top bar, or the **add dive** row at the foot of the list. The page is titled **add dive**. The **dive #** at the top is filled in with the next number after your highest one. Change it if you're catching up a paper logbook. Every section is optional. Leave a field empty and the dive saves without it. Tap **save** in the top bar. The app shows **dive logged** and returns you to your logbook, where the new dive appears and the count ticks up. If the app can't look up your next dive number, it says it couldn't start a new dive. Check your connection and try again. ## What each section records The form runs top to bottom in this order. Each heading below matches a section label on the form: **location**, **dive rating**, **time**, **conditions**, **tank**, **equipment** and **notes**. ### Location * **dive site**: the specific site, for example a reef or wreck name. * **search location**: the wider place, for example an island or country. Type three or more letters to see suggestions; tapping one fills in the place and drops a pin on the map. * **Coordinates**: type them as latitude, longitude (for example `20.31200, -87.03100`), or tap the location icon (**use current location**) to use where your phone is now. * **The map**: tap it to drop a pin where you dived. The app looks up the place name for that spot and puts it in **search location**, replacing what was there. Suggestions and place names need a connection. Without one, type the place yourself; the text and coordinates save as you entered them. Using your current location needs location permission; if it's off, nothing changes. ### Dive rating Tap one to five stars. ### Time * **date**: today by default. Tap it to pick another day. Future dates can't be picked. * **in / out**: the times you went in and came out. * **dive time**: worked out from **in / out**. You don't type it. * **safety stop**: starts at 3:00. Change it if yours was different. * **deco dive**: turn this on to show **total deco time**. ### Conditions * **light**: **day** or **night**. See [Day or night is set from the sun](#day-or-night-is-set-from-the-sun). * **water**: **salt** or **fresh**. * **entry**: **boat** or **shore**. * **max depth**, **visibility**, **surface temp** and **water temp**, each with its unit. **water temp** uses the unit chosen for **surface temp**. * **current**: tap one to three marks. * **altitude**: starts at 0 for sea level. Change it only for an altitude dive. ### Tank * The chip beside the section heading names your gas: **air**, **nitrox** or **trimix**. * **oxygen %**: tap **21** or **32**, or step up and down one percent at a time with the minus and plus buttons. * **deco gas**: turn this on to show **nitrogen %** and **helium %**. * **tank type**: **aluminum**, **steel** or **carbon**. * **pressure start** and **pressure end**, sharing one unit. Once both are filled, a **used** row shows the difference. * **tank volume**. ### Equipment * **weight belt**, with its unit. * **weighting felt**: how your weighting felt, from **very heavy** through **zen** to **very light**, or **not recorded**. * **wetsuit**: **none**, **1 mm** to **7 mm**, **semi-dry** or **dry**. * **warmth felt**: from **very cold** through **zen** to **very warm**, or **not recorded**. * The **gear used** row opens the checklist of gear you dived with. See [Gear used on a dive](/docs/logbook/dive-equipment). * The **dive type** row opens environment and dive style. See [Dive type](/docs/logbook/dive-type). * The **photos** row opens the dive's photos. See [Dive photos](/docs/logbook/photos). ### Notes * **dive shop/vessel**: who ran the dive. * Notes: the field grows as you write. ### Units Each measurement starts in the units from your settings. You can change a unit on any field for this one dive; the dive keeps the units it was saved with. See [Units and sizes](/docs/settings/units-and-sizes). ## Number fields **max depth** and **weight belt** take decimals, typed with a point or a comma (`12.5` or `12,5`). The other number fields take whole numbers only. **surface temp** and **water temp** also take a minus sign at the start, so you can log a reading below zero, such as `-2` on an ice dive; their keyboard includes the minus key. The other number fields don't accept a minus sign. If you type something that isn't a number, such as `12..5`, **save** stops and a notice names the field to fix. Empty fields never stop a save. On iPhone, a bar with **next** and **done** sits above the number pad, so you can move down the number fields without tapping each one. On Android, the keyboard's own next key does the same. ## What carries over from your last dive When you start a new dive, the app looks at your highest-numbered dive. If that dive is dated within the last 48 hours (counted from the start of its date, so in practice today or yesterday), these fields are filled in from it: | Carries over | Never carries over | | - | - | | **dive shop/vessel** | **dive site** | | **search location** (the place) and the map pin | **date** and **in / out** | | **weight belt** | **max depth**, **visibility**, **current** | | **tank type** and **tank volume** | **surface temp** and **water temp** | | **wetsuit** | Gas mix and pressures | | **altitude** | **dive rating** | | **water** (**salt** or **fresh**) | **weighting felt** and **warmth felt** | | **entry** (**boat** or **shore**) | **light** (**day** or **night**) | | The unit on each field | Notes, **safety stop**, **deco dive** | | | The equipment checklist and dive type | A line above the form says **carried over from dive #** followed by that dive's number. Tap **clear** on it to put the carried fields back to blank. **clear** leaves alone any carried field you've already changed. If your last dive is older than 48 hours, nothing carries over and the form starts blank. Nothing carries over when an unsaved dive is restored, either. ## Day or night is set from the sun On a new dive, once it has a **date**, an **out** time and a pin on the map, the app sets **light** to **day** or **night** from where the sun was at the site when you came out. Surfacing after sunset counts as night. This uses your phone's time zone. If you're logging later from a different time zone, check the **light** toggle. Tap it to set it yourself; after that the app doesn't change it for this dive. ## Unsaved dives are kept on this phone While you fill in a new dive, the app keeps a copy of the form on your phone each time you leave a field or switch away from the app. If the app is closed before you save, the next time you start a new dive the form comes back with **restored an unsaved dive**. * Tap **discard** on that line to throw it away and start blank. * The copy is stored only on this phone, for your account. It doesn't sync to your other phones. * It's removed when you save the dive, tap **discard**, or back out of the dive. * Edits to a dive you've already saved aren't kept this way. See [View, edit or delete a dive](/docs/logbook/edit-dive). ## Leave without saving Tap the back arrow. If you've entered anything, the app asks **discard this dive?**. Tap **discard** to leave and throw the dive away, including any gear used, dive type or photos you added to it, or **cancel** to keep working. A form you haven't touched closes without asking. On iPhone, swiping from the edge of the screen doesn't leave a new dive. Use the back arrow. ## Saving without a connection You can log a dive with no signal. If the save can't reach the server, the dive is still saved on your phone: the app shows **dive logged**, returns you to the logbook, and a notice says the dive is saved on your phone and will sync when you're back online. You don't need to save it again. If a save is refused for another reason, a notice says it couldn't save and everything you entered stays on the form, so you can try again. ## Related * [Browse and search your logbook](/docs/logbook/list) * [View, edit or delete a dive](/docs/logbook/edit-dive) * [Gear used on a dive](/docs/logbook/dive-equipment) * [Import a logbook](/docs/logbook/import) ## Related topics - [Dive type](/docs/logbook/dive-type.md) - [Gear used on a dive](/docs/logbook/dive-equipment.md) - [View, edit or delete a dive](/docs/logbook/edit-dive.md) - [Browse and search your logbook](/docs/logbook/list.md) - [Your logbook as a reference](/docs/zenfinder/logbook.md) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.