WHOI-90-52

In contrast with the heavily use waters of
the Inner Harbor, an adjacent lagoon (Cape Poge Bay)
is only lightly use by pleasure boats (becuse of limiting depth at the entrce) and has very
sparse shoreline residential development. This contrst in use for these water bodies provides
a useful basis for impact assessment, given that both embayments share a common source of
incoming tida water. A seond significat aspet of Cape Poge Bay is its very high yield of the
bay sclop--in 1988 this single water boy reportly produce nealy half of the commercial
landing of bay sclops for the state of Massachusetts. The singular importce surrounding
protetion this industr represents a speial element for our program.
Electronic Monitoring in Edgarown Harbor
Our approach has been to begin using "off-the-shelt' ENDECO/YSI instrments designed
primarly for use by scientists and environmenta engineers, and to modify or add to, these
instrments as appropriate to arve ultimately at an instrment package suitable for wide
application in coasta monitoring.
Two basic ENDECO/YSI instrment packages monitoring atmospheric and aquatic varables are
deployed around the harbor, with radio telemetr linking the instrments to a reciver base
station locted at the Woos Hole Ocographic Institution (WOI), 12 miles away. The
reciver base station controls sensor operation, monitors sensor status, and serves as a data
logger. It is linked by modem via telephone directly to ENDECO/YSI headquarrs in Maron,
Massachusetts, where performance of the system ca be observed and controlled. Ths has
turned out to be extremely valuable and cost effective for problem shootig and servicing by
ENDECO/YSI engineers.
The four remote monitoring sites at Edgarown--one meterologica station and three aquatic
ones--are polled via a two-way VHF radio link using a protocl which ENDECO/YSI markets
under the name" ADAPTVE P ACKET*" telemetry system. The instrment aray is controlled
by a reciver base station house within a stadard portble personal computer, whose overall
features are:
-menu driven systems programming
-imbeddd programming language
-interactive digitally synthesized voice communications via telephone or hand held
radio
-remote on-off control outputs
-conditional and boolean logical alarm statements
-discrete historical data archival
-user customized display screens
-networking of base stations
-built in text editor
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