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Page Title: Table 2. SI Data Sentences
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ERDC TN-DOER-I6
March 2001
= SI sentence label
LABEL
= Sentence comma delimited data
x.x
= Checksum
*hh
= End of sentence
<CR><LF>
Rules were also developed for the SI system data format. Each contractor will be assigned a
three-letter identifier to be placed in the manufacturer's mnemonic code. The sentence label
identifies the sentence corresponding to a predefined sentence format. Data that are not required
or unknown may be represented by a null field (,,) following the NMEA convention, and data
sentences that are not relevant to a particular project and do not contain required data may be
omitted.
The SI system data format is to be used for data reporting of all dredge information, including
that for dredge navigation, tide elevation, sensor output, and dredge production. Table 2
describes some of the data sentences used to transfer data. Required data values for a particular
contract are given in the specific deliverables section of the SI specifications. The SI
specifications include the detailed data sentence formats and examples.
Table 2
SI Data Sentences
Label
Data Description
DPOS
Horizontal positioning
DHCS
Heading, course, speed
BDEN
Hopper (bin) density-related data
TIDE
Tide
DRAG
Hopper dredge dragarm-specific data
PROD
Pipeline dredge production
DSTAT
Hopper dredge status reporting
DPUMP
Pipeline dredge pump
BPUMP
Pipeline dredge booster pump (optional)
SPPOS
Pipeline dredge spud horizontal position
(optional)
CHPOS
Pipeline cutterhead position
RST
Riverstage
CRPM
Pipeline cutterhead RPM (optional)
Dredge Plant Instrumentation Plan (DPIP). The SI specifications require the contractor to
submit a DPIP (Step 2). The DPIP documents the contractor's SI monitoring equipment and
operations, and supplies extensive information about the dredge that is needed by the Corps to
fulfill its data quality assurance role.
5

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