Engine speedIn range
700 RPMIdle normal 0–999 RPM
Features
How Salinity works.
How it learns your engines, every feature by system, what each status means and what you need aboard.
Engine monitoring
Engine and battery monitoring.
Salinity learns what each engine normally reads at each RPM range, trip by trip. When oil pressure, coolant, voltage or fuel flow moves outside that range, it tells you. Built, not in the current Android app.
See every reading Salinity can show ↗PORT · ENGINE 1 OF 2 · SIMULATED EXAMPLE · NOT IN CURRENT APP● Neutral idle
Current operating groupIdleLearned RPM range
The example updates every 0.8 seconds and mimics throttle changes. Salinity compares each reading with this engine’s learned normal for the RPM range it is running in.
18 trips · 164 grouped samplesNormal
At idle RPM, all four compared readings match this boat’s learned normal.
Fuel flowIn range
0.8 GPHIdle normal 0.3–1.8 GPHOil pressureIn range
40 PSIIdle normal 34–45 PSICoolantIn range
167 °FIdle normal 165–172 °FSystem voltageIn range
13.7 VIdle normal 13.4–14.6 VSmall demonstration. These readings only show the idea. Salinity is built to compare many more NMEA 2000 readings, depending on what the boat broadcasts.
Example only. Illustrative RPM ranges and readings for an example engine, not manufacturer limits, proof of safe operation, a diagnosis, or live boat data.
How it learns
Useful from trip one.
Hard reference limits and same-trip comparisons give context before Salinity has learned your engine. They never replace the helm display or manual.
Learns trip by trip.
Each complete trip adds oil pressure, coolant temperature, voltage and other supported readings to a separate normal for each RPM range, from idle to wide-open throttle.
Reads. Never controls.
Salinity uses that history to spot a move outside normal. It listens to NMEA 2000 but never sends commands back.
Six systems
Every feature, by system.
Every Salinity feature sits under one plain word. Open a system to see what works in the current Android app, what is built but not in it, what is in it but not proven, and what comes later.
Health21 tools
Is the engine acting normal?
Health
Worldwide NMEA 2000 monitoring with normal ranges learned from your own trips, plus fuel, range, and maintenance.
- Reference limits
- Multi-engine monitoring
- Trip-built normal
- RPM-range statistics
2 available14 not in current appView system ↗
Conditions11 tools
What will the water be doing?
Conditions
Weather, tides, currents, fishing windows, regulations, operating areas, and departure readiness.
- Weather forecast
- Live NOAA tides
- Currents
- Solunar
9 availableView system ↗
Underway13 tools
Where are we, and what is the boat doing?
Underway
Worldwide NMEA 2000 position, depth, and live boat data alongside downloaded chart layers and underway tools.
- NOAA Marine chart
- NOAA BlueTopo Relief
- USGS Satellite
- Website trip planner
2 available9 not in current appView system ↗
Trips13 tools
What happened out there?
Trips
Automatic tracks and summaries, engine history, catches, marks, photos, and the season’s working log.
- GPS journal
- Boat GPS handoff
- Automatic summaries
- Resale Passport
3 available1 unproven7 not in current appView system ↗
Safety12 tools
If the day changes fast, are we ready?
Safety
Emergency plans, man-overboard action, anchor movement, depth and tide margins, boat-system alarms, check-ins, and companion-watch alerts.
- Emergency Plan
- Departure message
- Man overboard
- Check-in reminders
6 available3 not in current appView system ↗
Trust14 tools
What happens when service disappears?
Trust
Offline operation, read-only boat access, private records, bounded storage, transparent limits, and verified builds.
- Read-only design
- Offline core
- Worldwide NMEA core
- Private records
7 available1 unproven3 not in current appView system ↗
Dock to dock
One day, dock to dock.
Salinity follows the job instead of making you work around its menu.
Health
See which maintenance items are due. Engine checks and fuel range are not in the current Android app.
Conditions
Review weather, tide, current, rules, and the operating area.
Underway
Keep the Emergency Plan, man-overboard alarm, tide alarms and solunar times at hand. Charts and live boat data are not in the current Android app.
Trips
Log catches with photos and notes. Trip recording, marks and engine history are not in the current Android app.
Status
What each status means.
Available
Usable today
You can use it today in the Android app offered on salinity.live, or on this website where the row says so.
ReadyNot in current app
Built, not in the current app
The work exists, but the Android app offered on salinity.live today does not include it. You cannot use it today.
OffUnproven
In the app, not proven
It is in the Android app offered on salinity.live today, but part of it has not been checked on a real phone. The row says which part.
UnprovenRoadmap
Visible, not sold as ready
Future work stays clear without pretending it can be used today.
LaterWorldwide NMEA 2000 compatibility
Works with any NMEA 2000 brand.
Salinity is not tied to one chartplotter, engine brand, or region. Its read-only Bluetooth gateway direction uses supported standard data already moving across the boat's NMEA 2000 network.
Those engine, position, depth, fuel, battery and environmental features are not region-locked, and they are not in the current Android app, which cannot connect to a boat. Salinity is read-only and never sends commands back to the network.
- Garmin
- Lowrance
- Simrad
- Raymarine
- Furuno
- B&G
- Humminbird
- Any other NMEA 2000-capable MFD
These are examples, not limits. The brand at the helm does not decide compatibility; the supported PGNs available on the network do.
- Yamaha
- Mercury & MerCruiser
- Suzuki
- Honda Marine
- Tohatsu
- Volvo Penta
- Yanmar
- Cummins
- Caterpillar
- MAN
- MTU
- Scania
- John Deere Marine
- BRP & Evinrude
- Any other engine bridged to NMEA 2000
These are examples, not limits. Some engine networks need an approved interface first, for example Yamaha Command Link or Mercury SmartCraft gateway hardware.
An unlisted brand is not excluded. Compatibility depends on the exact model, interface, supported PGNs, and data it publishes. Brand names are examples only; Salinity is not affiliated with or endorsed by these manufacturers.
Before you install
What you need aboard.
Salinity is an Android app; there is no iPhone app. NMEA-powered features need a compatible Bluetooth NMEA 2000 gateway, and the current Android app cannot connect to one, so engine, live-data and trip features are not in it. Weather, tides, currents, regulations, the catch log, maintenance reminders and phone-based safety tools work without engine data.
On the salinity.live trip planner, NOAA Marine and BlueTopo map coverage focuses on U.S. waters, and USGS Satellite is online-only. At launch there is one paid plan, Pro at $25 a month, with your first Salinity gateway included.
PhoneAndroidSigned APK for testers
EngineNMEA 2000 + BluetoothNot in current app
OffshoreOffline by designSaved tides, rules and plans work offline
Core useWorldwideRegional data depends on coverage
Boat memory
One record for the whole boat.
Salinity is designed so the boat, engines, sensors, trips, maintenance, conditions, places, files, credentials and owner-approved people all connect. That is how a single reading becomes a useful event, and how the history becomes more useful trip by trip. Engine readings and trips are not in the current Android app.
See the connected system ↗Boat
memoryNMEA 2000TripsServiceTidesRulesPeople
memoryNMEA 2000TripsServiceTidesRulesPeople
App use
How many phones use it.
Free and paid accounts both count. A signed-in phone records one last-seen time when internet is available. No boat, location, trip, catch, or engine data is needed.
- Today
- Used within 24 hours
- Active
- Used within 7 days
- Inactive
- More than 7 days
ACCOUNT ACTIVITY
People using Salinity
Counts come from one signed-in check-in time. No boat, location, trip, catch, engine, or screen activity appears here.
Offline use is counted after the phone reconnects. Free accounts are included.