Buhlmann ZH-L16C decompression model
Decompression ceiling and tissue saturation calculations are based on the Buhlmann ZH-L16C algorithm. Gradient factor extensions follow conventions established in the technical diving community.
Acknowledgements
Last updated: 2026-05-17
Scientific and medical inspiration
Surface risk score and DAN Europe research
Sentinel Dive's personalized surface risk scoring was inspired by published research from Divers Alert Network (DAN) Europe, including work on venous gas emboli, surface supersaturation gradients, and physiological risk factors for decompression sickness. Sentinel Dive is independent and is not endorsed by or affiliated with DAN Europe.
Oxygen toxicity limits
CNS% and OTU calculations are based on oxygen exposure limits published by NOAA in its Diving Manual, widely used as a reference for nitrox diving safety.
Additional diving physiology sources
General diving physiology and safe-diving concepts were informed by publicly available educational resources from organizations including DAN, PADI, and BSAC.
Android application software
libdivecomputer
LGPL v2.1. Dive computer BLE/USB communication. Copyright Jef Driesen and contributors.
Sentinel Dive JNI bridge
Open-source bridge for libdivecomputer integration: bitbucket.org/sorinluca/sentinel-dive-jni-bridge.
Android Jetpack and Jetpack Compose
Apache 2.0. UI, lifecycle, navigation, WorkManager, Room, AppCompat, and platform support libraries.
SQLCipher and AndroidX Security
Encrypted local database and AndroidKeyStore-backed secure preference storage.
Retrofit, OkHttp, and Gson
HTTP networking and JSON serialization for sync and API features.
Coil and ExifInterface
Image loading, caching, and image metadata handling for dive photos and certification files.
ML Kit Text Recognition and ZXing
Text recognition and barcode/QR handling used by certification and document workflows.
usb-serial-for-android
MIT. USB serial communication for supported dive computer import flows.
Google Play Services Location
Location services for dive site and marine condition features.
osmdroid and OSMBonusPack
OpenStreetMap rendering, map overlays, and marker clustering in the Android app.
Backend and web software
Node.js, TypeScript, Express, and Zod
Backend runtime, API framework, and schema validation.
Prisma, PostgreSQL driver, and database tooling
Database access, migrations, and typed persistence for the backend service.
Helmet, CORS, rate limiting, bcrypt, and JWT libraries
Security headers, origin policy, request throttling, password hashing, and token handling.
Multer and Sharp
Upload handling and image processing for photos and certification files.
Resend
Email delivery for verification and account workflows.
Google Generative AI SDK
Optional AI-assisted features when configured by the user or service.
Next.js, React, React DOM, React Hook Form, and React Query
Web application framework, UI runtime, forms, and server-state management.
Leaflet and React Leaflet
Interactive maps in the Web Application.
Lucide React, Sonner, Zustand, Axios, clsx, and tailwind-merge
Icons, notifications, state, API calls, and UI utility helpers.
Astro and Tailwind CSS
Static landing site and public policy pages.
Map and external data
OpenStreetMap
Map tiles, place names, and POI data are provided by OpenStreetMap contributors and are available under the Open Database License. See openstreetmap.org/copyright.
Marine and environmental data
Marine condition features may use external weather, geocoding, or map data providers to display environmental context for selected locations.
License note
This page summarizes major references and third-party components used by Sentinel Dive. Individual open-source packages remain governed by their own license files and upstream notices.