Points North Ltd.

Marine Gyro Compass / Navigational & Communication Systems   Marine Electrical & Electronic Systems

UNIVERSAL COURSE  RECORDER & TAPE   HEADING REPEATER - 991 CR

INTRODUCTION

The instrument is a low cost replacement for “course recorders.”

It connects directly to the gyro and GPS equipment.

Compass and GPS data is shown on the display. The 991CR is programmed to output a single line of data at selective intervals. The data is fed to a standard low cost printer, or to a PC for recording on disk. The interval between outputs are:-

a)                  Output every 6 minutes. (0, 6, 12 etc. 1/10^th hour.)

Paper usage on passage would be typically 4 pages per day.

b)                  Output if course changes by 2 degrees from the last output. This occurs no faster than at a 10-second interval. Paper usage during manoeuvring would be typically 3 pages per hour.

c)                  Output on demand by pressing the keypad Wheel button.

The 991CR is not just a course recorder! The screen presentation of a moving tape allows the instrument to be used for as a Heading Repeater. Screen selection is by a tactile six –button keypad.

SPECIFICATION

INPUT 1:                DC and rectified unsmoothed DC stepper, 4 to 90v. 360:1 synchro up to 115v/90v. 50/60 400/500 Hz.

90X 400 Hz contactless transmitter. Tracking rate = Frequency/3 deg/sec. (DC step 333 deg/sec)

Option: M-type resolved to 1/3 deg. OR NMEA 0183 input, so both input channels are NMEA.

Input 1 must be $HEHDT,x.x,T

INPUT 2:                NMEA 0183, GPS data or GPS and heading data.

These sentences provide the data required. $GPRMC or $GPGGA + $GPVTG + $GPZDA.

OUTPUT 1:            4800 baud.  8 bits. No parity. 1 stop bit. RS422 and RS232 compatible.

Example: time, position, course, speed and course over ground, date.

12:30:00   51 30.521N 003 23.456 W  009 deg 12.0 sog 012 cog 25:12:99

OUTPUT 2:            3 x 5v CMOS ports to sink or source 5 mA.

Alarm output as default. Fit a 5 volt low power audible alarm or relay for high power alarm.

SCREENS:             Presentation screens, Tape; width +/- 15 degrees and +/- 12.5 degrees.

Tape traverse rate 20 deg/second independent of input tracking rate.

Large digital 41 mm high.

Digital with analogue ROT information.