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Logging Depth
PC/View can log the tracked depth in a file and
send it out over a serial port. To activate this fea-
ture, select Depth Log Schedule... from the File
menu and click in the check box labeled Enable
Automatic Depth Log. Next, select a format for the
logged depth. Choose ASCII format or NMEA
0183 sentence format. The ASCII format includes
the date, the time and the depth below the trans-
ducer in the current Units.
For the NMEA 0183 format, any or all of four sen-
tence types can be saved. NMEA 0183 format sen-
tences begin with a dollar sign followed by the
two-character talker identification followed by the
three-character sentence type. The talker identifica-
tion for PC/View is SS, for scanning sonar. Data
fields in the sentences are comma-delimited and
the sentences end with a star followed by the
checksum. PC/View uses the following four sen-
tence types:
DPT - Depth with Keel Offset. This sentence in-
cludes the water depth, in meters, relative to the
transducer followed by the offset from the trans-
ducer in meters.
DBT - Depth Below Transducer. This sentence
includes the water depth in feet; the water depth in
meters and the water depth in fathoms, all refer-
enced to the transducer.
ASCII Depth Format
ZDA - Time and Date. This sentence includes, the
Universal Time Coordinated (UTC), the day, the
1999/03/31 16:43:29.01 12.2 ft.
month, and the year, all in UTC, and the local zone
hours and minutes (Atlantic Standard Time is local
Year
zone 05 hours, 00 minutes).
Month
Depth
GLL - Geographic Position Lat/Lon. This sentence
Day
includes the latitude in degrees and decimal min-
Hour
Units
utes, north or south, the longitude in degrees and
Minute
decimal minutes, east or west, the UTC of the posi-
Second
tion and an indicator of the validity of the informa-
tion. The talker identification for this string is that
of the navigation source rather than SS.
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