2 – System Components
The standard MicroEel Solid Analog Streamer system includes the following items:
Active section cable with tow cable, tail and eye bolt, and deck cable, coiled in a
plastic crate
DHA-7/MicroEel Battery Pack
Universal AC battery charger for the DHA-7/MicroEel Battery Pack
CD with support documents (*.pdf) including the operations manual, connector
wiring tables, and hydrophone calibration plots
2.1 Cable
The active section consists of a series of hydrophone groups, with the number of groups
equal to the number of channels, either 12 or 24 as a standard; other channel counts are
available through custom order. The available group intervals are a minimum of 1 m and
a maximum of 6.25 m in length. For group intervals between 3.125 and 6.25 m, there are
three depth-limited hydrophones spaced 0.11 m apart (0.22 m aperture) with the signal
summed electrically and connected to a preamplifier. For hydrophone groups less than
3.125 m, there is one hydrophone per group connected to a preamplifier. Other
hydrophone counts per group are available through custom order. All of the components
are in-line molded to a multi-conductor cable with a polyurethane jacket and Kevlar
center stress core; this is further encased in Geometrics’ proprietary solid flotation
material.
The tow, active section, and tail cables are all one integrated piece, with no
interconnections in between. The tow cable connects to a topside deck cable. The deck
and tow cables are terminated with mating waterproof connectors. The opposite end of
the deck cable is finished with a Y-type termination to connect to the DHA-7/MicroEel
Battery Pack and seismograph. The total maximum length of the streamer from head of
the deck cable to tail of the active section is 400 m.
MicroEel Solid Analog Streamer Operation Manual
Page 5 of 18
Rev. C 050612 du
