KP-39A B CLASS AIS

The ONWA KP-39A is a compact 7-inch GPS chartplotter with a built-in Class B+ AIS transponder. It enhances navigational safety with electronic navigation charts and enables data sharing with surrounding vessels via AIS. It offers extensive navigation support with K-Chart, C-Map Max and Navionics+ map compatibility.

Key Features

Built-in Class B+ AIS Transponder

Displays AIS targets (including CPA/TCPA alarm) on the map and automatically records ship positions (1000 automatic, 10 manual).

Flexible Map Support

Internal world map and map loading capability compatible with K-Chart 2.0/3.0, C-Map Max, Navionics+.

Powerful GPS Receiver

50-channel GNSS receiver, GPS and Beidou supported, provides location in ~29 seconds at cold start and ~1 second at warm start; location accuracy is ~3 m with 95% probability.

Storage of Extensive Navigation Data

It provides 12,000 user waypoints, 30 routes (170 points each), 8,000 track points and 10 saved routes.

Durable Structure & Convenient Dimensions

IP66 waterproof (front panel and antenna), dimensions 187×250.1×88mm, weight only ~1.03kg, works in wide temperature range.

Technical Specifications

Display: 7″ color TFT dayview LCD, 800 × 480 px, sunlight resistant
Number of Waypoints/Marks: 12,000 user waypoints + 3 system waypoints (MOB, Start, Cursor) + 10 orientation markers
Route Support: 30 routes (170 points each), MOB, Track Navigation / Goto Track modes
Saved Tracks: 8,000 points automatic track recording; 10 saved tracks (8,000 points each)
Alarms: XTE, anchor drift, arrival, speed, voltage, proximity beacon, timer and AIS (CPA/TCPA) alarm
Drawing Tools: 1,000 markers, 2,000 lines (40 points each), 1,000 place names, 8 color palettes
Palette Modes: Normal, daylight, night, NOAA paper map colors
Tide Data: Internal tide data worldwide
Location Format: Latitude/Longitude
Map Compatibility: Built-in world map + maps supported by K-Chart 2.0/3.0, C-Map Max, Navionics+
Data Storage: Internal backup and external SD card
Plot Range and Scale: 5 s to 60 min / 0.01 to 10 nm; Scale: 0.001–700 nm
Perspective View: On/Off (with C-Map)
Sky Data: Sunrise/sunset, Moonrise/set
GPS Receiver: 50-channel GNSS, cold start ~29 s, warm start ~1 s, update 1 s, accuracy ~3 m
SBAS: Assisted; Satellite Systems: GPS, Beidou; Dynamic Limits: Altitude 18,000 m, Speed 515 m/s; Datum: WGS-84 & user-defined
GPS Interface: RS‑232, NMEA 0183 (V3.01 / V4.11), automatic baudrate (4800–38400)
AIS Interface: RS‑232 output VDO, VDM, GGA, GSA, GSV, VTG; output baud 38,400; frequency 156.025–162.025 MHz; SOTDMA, 25 kHz channel width; GMSK modulation; 9,600 bps; >5 W output power; receiver sensitivity < –107 dBm; compliance with IEC‑62287‑2 standard prev.onwamarine.com
NMEA Input/Output Sentences: GGA, GLL, GSA, GSV, RMC, VTG, ZDA, MTW, VWR, MWD, VPW, VHW, TLL, TTM, VDO, VDM, GNS, MTA, RMA, DBT, DPT, MWV, BWC, XTE, ZDL, WPL, AAM, APB, BOD, RMB, DSC, MDA, RPM, XDR; Pagination options support different baudsprev.onwamarine.com
Power Supply: 10.5–30 V DC, approximately 1.5 A (based on 12 V)
Physical Dimensions: 187 × 250.1 × 88 mm; Weight: ~1.03 kg
Waterproof: Front panel and antenna IP66 protection class
Operating Temperature: Display: -15°C to +55°C; Antenna: -25°C to +70°C
Package Content: Display unit, quick user guide, GPS patch antenna (4 m cable, SMA), mounting brackets, standard accessory package

Usage Advantages

Safe navigation with compact and integrated AIS
Flexible use with wide map compatibility
Powerful and precise GNSS positioning
Rich route, track and waypoint management
Durable, waterproof and robust design
Advanced alarm and drawing tools
Connection options compatible with NMEA and RS‑232 interfaces
Additional navigation data such as sunrise/moonrise
Lightweight and easy-to-install physical structure
Configuration suitable for professional and amateur sailors

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