In the past course has been recorded with a pen-plotter and highly expensive custom graph paper. The KW991 uses a low cost dot matrix printer and plain paper (roll or fan-fold), and it prints intelligently in plain text, along with time.
The data may be recorded on a PC using a free data logging program, as a simple Voyage Data Recorder.
GPS input provides timing. A routine log of position and speed over ground is printed. The output data rate is variable, automatically, to this simple rule, to minimize the use of paper