CapMate shows depth, wind, boat speed, heading, position and AIS vessels from your boat's instruments on your phone and watch. The data arrives over Wi-Fi as NMEA 0183: either the chartplotter shares it itself (B&G, Simrad, Lowrance) or a Wi-Fi gateway on the instrument network does. Raymarine, Garmin and Furuno don't share their data with other apps — they need a gateway. Phones and Wear OS watches join the boat's Wi-Fi themselves; Apple Watch and Garmin watches get the instruments through the phone running CapMate.
Turn on instrument reception and the rest happens by itself. CapMate first checks the address where it found the instruments last time, the network router and the addresses of known gateways on their ports, while listening for UDP broadcasts. If nothing is there, it scans its own network: it finds the devices that answer and tries the chartplotter and gateway ports from the list below on them. This usually takes from a couple of seconds to half a minute; the address it finds is remembered, so next time the connection is instant. If a device is found but sends data in the wrong format (for example NMEA 2000 instead of NMEA 0183), CapMate tells you what to change on it.
The plotter shares its instruments and AIS over Wi-Fi itself — no gateway needed.
On the plotter: Settings → Network → NMEA0183 → “NMEA0183 over Ethernet/Wireless” — output must be on, port 10110.
Join the plotter's Wi-Fi with your phone (Settings → Wireless, a network like “Zeus3 xxxx”) or the boat router if the plotter is connected to it. Older models get Wi-Fi from a GoFree WIFI-1 module — the key is on its label.
Back in CapMate the plotter is found automatically, usually within seconds.
The newest models (B&G Zeus S and Zeus SR, Simrad NSX and NSS 4, Lowrance Elite FS) have no NMEA 0183 network output in their documentation; on Lowrance HDS Pro it isn't confirmed. If the plotter isn't found, any NMEA 2000 Wi-Fi gateway from the list will do.
TCP 10110 · 192.168.76.1 · ✓ Tested on a boat 2026-10-06
Garmin plotters share data over Wi-Fi only with Garmin apps. You need an NMEA 2000 Wi-Fi gateway — it takes the same data from the instrument network.
Connect the gateway to the NMEA 2000 backbone through a free T-connector.
Make sure NMEA 0183 output is on in the gateway — see the gateway's steps below.
Join the gateway's Wi-Fi with your phone and pick the gateway in the list — CapMate will check it first.
If the boat has a Garmin Cortex AIS or a Garmin Signal VHF radio, they share NMEA 0183 over Wi-Fi themselves — no gateway needed: pick “Vesper · Garmin Cortex”.
Works out of the box: the gateway shares NMEA 0183 over Wi-Fi by itself.
Join the gateway's Wi-Fi with your phone: network YDWG (other models: YDNR, YDWN, YDWR), password 12345678.
Back in CapMate the gateway is found automatically (address 192.168.4.1, TCP port 1456).
YDEN-02 is wired: plug it into the boat router — CapMate will find it on the network.
If settings were changed: open 192.168.4.1 in a browser (admin / admin) → NMEA Server → set Server #1 Data Protocol to “NMEA 0183”. If the gateway was switched to client mode, its own network disappears — it is on the boat router’s network, and CapMate finds it there.
One setting needed: a data server in NMEA 0183 format.
Join the gateway's Wi-Fi: network w2k-xxxxxx (the gateway's serial number), the password is on its label.
Open 192.168.4.1 in a browser (admin / admin) → Settings → Data Server Settings. Server 1: enable, Protocol TCP, Format “NMEA 0183”, Direction “Transmit Only”, port 60001 → Update.
Back in CapMate the gateway is found automatically.
W2K-2 and WGX-1 are set up the same way — three data servers in the gateway’s web interface; each unit has its own network name and password. PRO-NDC-1E2K connects to the boat router by cable.
Digital Yacht — NavLink2, WLN10, WLN10 Smart, WLN30, iKommunicate, LANLink
Digital Yacht AIS — AIT5000, AIT3000, iAIS
Digital Yacht Wi-Fi gateways and AIS units work out of the box: they share NMEA 0183 over Wi-Fi by themselves.
Join the device's Wi-Fi — a network named after the model plus a code, e.g. NavLink2-xxxx or AIT5000-xxxx (WLN30: DY-WiFi-xxxx). If asked for a password, it's PASS-xxxx with the same four characters as in the network name.
Back in CapMate the device is found automatically (address 192.168.1.1, port 2000; older WLN10 and iAIS units use 169.254.1.1).
LANLink and iKommunicate connect to the boat router by cable. iKommunicate ships with NMEA 0183 output off: Admin Page → Configuration → enable NMEA 0183 over TCP → Apply.
The original WLN10 and the WLN30 accept a single TCP connection — if no data arrives, close other apps. AIT5000 sends over UDP only by default — for iPhone, select TCP in its web interface (192.168.1.1 → Settings).
Works out of the box: the gateway shares NMEA 0183 over Wi-Fi by itself.
Join the gateway's Wi-Fi: a network like A032xxxx or QK-A034xxxx (depends on the model), password 88888888.
Back in CapMate the gateway is found automatically (address 192.168.1.100, TCP port 2000).
To use the gateway through the boat router, switch it to client (Station) mode with the Quark-Elec configuration tool for Windows over USB.
QK-A032, A034 and A036 can send NMEA 2000 as $PCDIN lines — if CapMate reports this while searching, switch the output back to NMEA 0183 in the configuration tool. In access-point mode the gateway takes up to four devices.
Works out of the box: the MiniPlex shares NMEA 0183 over Wi-Fi or Ethernet by itself.
MiniPlex-3Wi: join the Wi-Fi network MiniPlex-xxxxxxxx (serial number), password MiniPlex (address 10.0.0.1, TCP port 10110).
MiniPlex-3E: plug it into the boat router — it gets an address by itself and broadcasts data over UDP to port 10110.
Back in CapMate the multiplexer is found automatically. N2K models convert NMEA 2000 data to NMEA 0183 out of the box.
The MiniPlex accepts a single TCP connection — if no data arrives, close the program on the laptop. For iPhone, enable the TCP server of a MiniPlex-3E in MPX-Config3 (Network Settings).
AIS transponders with Wi-Fi share AIS, position and some instruments over Wi-Fi by themselves.
Cortex: join the Wi-Fi network CORTEX-xxxxx (hub serial number), the password is on the label under the hub (address 10.1.1.1, TCP port 39150).
XB-8000: join the transponder's Wi-Fi (address 192.168.15.1, TCP port 39150). Garmin Signal VHF radio: turn on Wi-Fi in the radio's menu (Settings → Wi-Fi).
Back in CapMate the device is found automatically, even when it's connected to the boat router.
From the NMEA 2000 network, Cortex passes on only some instruments (wind, depth) — an NMEA 2000 Wi-Fi gateway gives the full set.
The phone or watch is on a different Wi-Fi. Join the network of the chartplotter, gateway or boat router: mobile data and marina Wi-Fi won't work.
NMEA 0183 network output is off on the chartplotter or gateway — turn it on following the steps above.
The gateway outputs NMEA 2000 in its own format (RAW, N2K ASCII, binary) — switch its server to NMEA 0183. CapMate points this out during the search.
The gateway accepts a single TCP connection and a laptop or another app already holds it — close it or enable another NMEA 0183 server on the gateway.
On marina and guest Wi-Fi networks devices can't see each other — use the boat's own network.
On iPhone, allow CapMate to use the local network: Settings → CapMate → Local Network.
Position works but there's no depth or wind — those sensors aren't on the NMEA 2000 network or the chartplotter doesn't output them as NMEA 0183: check the list of output sentences.
Manual connection
If you know the address, enter it yourself: “Connect instruments” → “Enter the address manually” — the device address, port and protocol (TCP or UDP) from the NMEA 0183 server settings of the chartplotter or gateway. To go back to automatic search, tap “Search automatically”.