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Northstar M121/M84 Installation and Operation Manual100
Appendix A - Specifications
GENERAL
M121 Size: 256 mm (10.08“) H x 385 mm (15.16“) W x
78.5 mm (3.09“) D. Allow 3 mm clearance on each
side for dust cover.
M84 Size: 190 mm (7.48“) H x 285 mm (11.22“) W x 76.8
mm (3.02“) D. Allow 3 mm clearance on each side
for dust cover.
M121 Display: 307 mm (12.1”) diagonal, TFT color, 800
x 600 pixels.
M84 Display: 213.4 mm (8.4”) diagonal, TFT color, 800
x 600 pixels.
Backlight: Display and keys
Supply voltage: 10.5 to 32 V DC.
Supply current: at 13.8 V
350 mA min - no backlighting.
1A max - full backlighting.
External beeper or light output: Switched
to ground to sound alarm, 30 V DC, 200 mA
maximum.
Operating temperature: 0° to 50°C (32° to 122°F)
ALARMS:
User set: Arrival radius, anchor, XTE, danger, too
shallow, too deep, fish, temperature, temperature
rate, low battery, low fuel (optional), loss of DGPS
fix, radar guard zone, dangerous AIS vessels.
GPS NAVIGATION
Chart card: C-MAP™ SD Card (NT-MAX, NT+ or NT)
User card: SD Card
Waypoints: Up to 3000, with default or user-defined
alphanumeric names up to eight characters.
Routes: 25 Routes, with up to 50 points each
Tracks: By time or distance, one track of 2000 points
and four of 500 points.
Chart datums
121 Chart datums (see next page)
One user-defined map shift.
Chart scale: 0.05 to 4096 nm for chart (chart
dependent) down to 0.01 nm in plotter mode.
SONAR FISHFINDING
(Optional sonar transducer required)
Depth range: 1 m (3 ft) to 1000 m (3300 ft )
Sonar output:
Power: Variable, up to 600/1000 W RMS
Dual frequency: 50 khz and 200 kHz
Depth acquisition time from startup:
Typically 2 seconds at 30 m (100 ft)
Temperature:
Range 0° to 37.7°C (32° to 99.9°F)
Resolution of 0.1° unit.
Speed (from paddlewheel transducer):
1 to 96.6 kph (57.5 mph, 50 kn).
FUEL COMPUTER
(Optional fuel sensor(s) required)
Engine types:
Outboard carburetted two stroke and EFI
petrol/gasoline engines: 50 to 300 hp.
Outboard four stroke petrol/gasoline engines: 90
to 300 hp.
Inboard petrol/gasoline engines: 70 to 400 hp.
Flow rate:
Minimum: 5 litres per hour (1.3 U.S. gallons per hr).
Maximum: 130 litres per hour (34 U.S. gallons per hr).
COMMUNICATIONS
NavBus
Connection to other Northstar instruments.
NMEA: NMEA 0183 ver 2 4800 baud
Inputs from compatible instruments:
BWR, DPT, GGA, GLL, GSA, GSV, HDG, HDM, HDT,
MTW, MWV, RMC, VHW, VTG and DBT
Outputs, for compatible instruments:
APA, APB, BWR, DBT, DPT, GGA, GLL, GSA, GSV, RMB,
RMC, MTW, VHW, VLW, VTG, XTE
STANDARDS COMPLIANCE
EMC:
USA: FCC Part 15 Class B.
Europe: (CE) EN301843-1
New Zealand and Australia: (C Tick) IEC60945
Environment: IPx6/IPx7/CFR46 (with card holder and
connections in place)
Video
75Ω BNC Connector. Most PAL and NTSC formats
supported. (PAL BGHI, PAL N, Combination PAL N,
PAL M, NTSC M, NTSC N, NTSC 4.43, NTSC-Japan
and SECAM)