Table 2. SI Data Sentences

ERDC TN-DOER-I6

March 2001

= SI sentence label

LABEL

= Sentence comma delimited data

x.x

= Checksum

*hh

= End of sentence

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.