Manual

June 2004 Isis® Sonar User's Manual, Volume 2

assumed to be in lat/long degrees. This token

overrides this behavior and forces nav back to UTM.

SAVERAW //This causes Isis to save the exact serial string to the

current XTF file before processing in “raw” format.

SHIPPOS //This tells Isis that the position coming in on the

selected com port will be assigned to the ship position

only. This is useful when a navigation system is

sending sensor position on one com port while a GPS

receiver is reporting ship position on another com

port.

f only one nav input is available, do not use {SHIPPOS}.

All NMEA sentences are preceded by six characters. The first three

characters are $XX, where XX is the two-letter code for the source of the

navigation solution. For example:

$GPGPS

$LCLORAN C

Isis ignores these first three characters. As many as three more characters

can follow the first three. The next three characters after the first three

characters in each string identify the specific NMEA sentence to follow. All

sentences are comma-delimited and end with *XX, where XX is a

checksum. Isis (and Q-MIPS) support five sentences, shown next:

$PKLA // Serial output from Klein 2000. For further

information on this feature, consult the

manufacturer’s documentation.

$EGTSP // Serial output EG&G DF1000. For further

information on this feature, consult the

manufacturer’s documentation.

Appendix D: Serial Interfaces