General Information
•
The Sonar Processor can be rack mounted in the operating space. There is
no requirement for the operator to handle the processor other than to connect
the Trackball to its front, or rear, panel and operate the system Power On/Off
switch. The Sonar Processor is the source of operating power for the Sonar
Head and all system I/O connections are made at the processor's rear panel.
•
The Sonar Processor to Sonar Head Signal and Control cable is a multi-
conductor cable of water-blocked construction with a molded waterproof
pressure immune connector at the wet end and an MS-type connector at the
dry end. The standard cable is 25 meters in length; for lengths greater than
standard, contact RESON.
•
The Sonar Head is compact, with no moving parts. It may be temporarily
mounted on a retractable structure, such as a bracket or pole, or permanently
on an extension through the hull in a moon pool, sea-chest configuration, or
on a Remotely Operated Vehicle (ROV) . The head is available in a titanium
alloy depth rated to 1500 meters and anodized aluminum with depth ratings of
100 and 300 meters.
•
The Color (S-VGA) Monitor is a standard PC-type S-VGA monitor and should
be table mounted with sufficient working area to accommodate the Trackball.
•
The Trackball (or mouse) is a modified commercial three button unit.
1.1.2
How Does the SeaBat 8101 Work?
The transmit array (projector) section of the Sonar Head transmits a pulse of
acoustic energy, which travels through the water medium and is reflected by the
sea floor, or any objects in its path. The reflected signal is received by the re-
ceive array (hydrophone) section of the Sonar Head, digitized by internal elec-
tronics, sent to the topside Sonar Processor for beamforming and processing.
The Sonar Processor generates the video displayed on the monitor and functions
as the control interface between the operator and the sonar system as well as
formatting a digital output to be used by a peripheral bathymetric data processing
system.
1.1.3
How Far Does the SeaBat 8101 "See"?
480 meters is the maximum selectable range scale. The 8101 system illuminates
a swath on the sea floor that is 150º across track by 1.5º along track. Across
track beam spacing is nominally 360/240 = 1.50000º; these values are provided
in each bathymetry packet header. The swath consists of 101 individual 1.5º by
1.5º beams (the 210° Option uses 141 beams) with a bottom detection range
resolution of 1.25 cm.
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SeaBat 8101 Operator's Manual
1-3
Version 3.02
